--- title: O — The school dictionary with trees and pragmatics · page 2 description: The 416 words of the school dictionary under O, every meaning for a pupil and every example with its dependency tree and pragmatics. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/dictionaries/school/O/page/2/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [dictionaries](https://md.mova.elamur.ai/free/en/corpora/dictionaries/) / [school dictionary](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/) / O # O — The school dictionary · page 2 [1](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/) **2** [3](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/page/3/) [4](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/page/4/) [5](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/page/5/) - [office](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/office/) — An office is a room or building where people work at desks, often with computers and papers. — 10 sentences - [officer](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/officer/) — An officer is a police officer, a person whose job is to keep people safe and make them obey the law. — 11 sentences - [official](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/official/) — Official means approved by people in charge, like a government, school or organisation. — 12 sentences - [officially](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/officially/) — Officially means in a way that is approved by people in charge, according to the rules or the law. — 10 sentences - [officiate](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/officiate/) — To officiate at a wedding, funeral or service is to lead it as a priest, minister or official. — 9 sentences - [officious](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/officious/) — Officious means too eager to give help or orders when nobody asked for them. — 5 sentences - [offshore](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/offshore/) — Offshore means in the sea, away from the coast. — 10 sentences - [offside](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/offside/) — In a position on the field that the rules don't allow, usually too far forward, ahead of the ball or the other team's last defender. — 8 sentences - [offspring](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/offspring/) — Offspring are the young of an animal or plant: its babies or seeds. — 11 sentences - [often](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/often/) — Often means many times. If you often play, you play a lot. — 13 sentences - [ogre](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/ogre/) — An ogre is a huge, frightening giant in stories who eats people. — 5 sentences - [ogress](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/ogress/) — An ogress is a female ogre, a huge, frightening giantess in stories who eats people. — 5 sentences - [oil](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oil/) — A thick, slippery liquid that does not mix with water, from plants or animals, used in cooking: olive oil. — 13 sentences - [oilbird](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oilbird/) — A brown, night-flying bird of South America and Trinidad that lives in caves, eats fruit and finds its way in the dark by clicking, a bit… — 7 sentences - [oily](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oily/) — Covered with oil or containing a lot of oil: «oily hands», «oily fish». — 11 sentences - [oink](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oink/) — An oink is the grunting sound a pig makes. — 8 sentences - [ointment](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/ointment/) — A smooth, greasy cream rubbed on the skin to heal cuts, burns, rashes or sore places. — 9 sentences - [oireachtas](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oireachtas/) — The national parliament of Ireland, made of the President, the Dáil (lower house) and the Seanad (Senate). — 8 sentences - [ok](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/ok/) — All right; acceptable; good enough: «Is it OK if I sit here?». — 12 sentences - [okapi](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/okapi/) — An okapi is a shy African forest animal with a brown body and black-and-white stripes on its legs, like a zebra's. — 8 sentences - [okay](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/okay/) — Okay means all right, fine, not hurt or not upset: are you okay? — 15 sentences - [ola](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/ola/) — Not an English word on its own. It may be a piece of a longer word, as in "cola", "granola" or "Coca-Cola". — 10 sentences - [old](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/old/) — Old tells how long someone or something has lived or been: «Tom is 7 years old». — 23 sentences - [olden](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/olden/) — Olden means belonging to the long-ago past; «in the olden days» means a long time ago. — 8 sentences - [older](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/older/) — Older means having lived more years than someone else. — 11 sentences - [olfaction](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/olfaction/) — The sense of smell, or the act of smelling. — 7 sentences - [olive](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/olive/) — An olive is a small oval fruit, green or black, with a stone inside, that grows on olive trees and is eaten or pressed for oil. — 11 sentences - [olm](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/olm/) — An olm is a pale, blind salamander (an amphibian) that lives in dark underground cave waters in southern Europe, especially Slovenia and C… — 8 sentences - [olympiad](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/olympiad/) — An olympiad is a contest where pupils solve hard problems, for example in maths, physics or chess. — 10 sentences - [olympian](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/olympian/) — Olympian means belonging to the gods who lived on Mount Olympus in Greek stories. — 5 sentences - [olympic](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/olympic/) — Olympic means about the Olympic Games, the biggest international sports competition, held every four years in summer and winter versions. — 10 sentences - [omega](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/omega/) — Omega is the last letter of the Greek alphabet, written Ω or ω. — 10 sentences - [omelet](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/omelet/) — An omelet is eggs beaten up and cooked flat in a pan, often with cheese or herbs. — 5 sentences - [omelette](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/omelette/) — An omelette is a dish of beaten eggs cooked flat in a frying pan, often folded over a filling such as cheese, ham or vegetables. — 7 sentences - [omen](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/omen/) — A sign or event that some people believe shows that something good or bad will happen in the future. — 8 sentences - [ominous](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/ominous/) — Ominous means showing that something bad is about to happen; it is a warning sign. — 4 sentences - [omission](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/omission/) — Something that has been left out or not done. — 9 sentences - [omit](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/omit/) — To leave something out, on purpose or by mistake. — 9 sentences - [omnibus](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/omnibus/) — A book or TV programme that puts several stories or episodes together in one. — 10 sentences - [omnivore](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/omnivore/) — An omnivore is an animal that eats both plants and other animals. — 9 sentences - [on](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/on/) — On means touching the top or side of something: on the table, on the wall. — 25 sentences - [once](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/once/) — Once means one time. — 23 sentences - [oncoming](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oncoming/) — Coming towards you or moving nearer: «oncoming traffic», «an oncoming storm». — 7 sentences - [one](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/one/) — One is the number 1, the first and smallest whole number above zero. — 28 sentences - [oneida](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oneida/) — A Native American people, one of the Six Nations of the Haudenosaunee (Iroquois Confederacy), from what is now New York State; also their… — 7 sentences - [onion](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/onion/) — A round vegetable with layers, papery brown, red or white skin and a strong smell and taste, used in cooking. — 11 sentences - [online](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/online/) — Connected to the internet or done on it. — 12 sentences - [onlooker](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/onlooker/) — An onlooker is a person who watches something happen but does not take part, especially an accident, fight or event in the street. — 9 sentences - [only](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/only/) — Only means no more than, or just one. «Only 3 are left» means just 3 are left. — 25 sentences - [onomatopoeia](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/onomatopoeia/) — Onomatopoeia is when a word sounds like the noise it describes, such as buzz, bang, sizzle, hiss, splash, cuckoo and woof. — 10 sentences - [onondaga](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/onondaga/) — A Native American people of central New York State, one of the Six Nations of the Haudenosaunee (Iroquois Confederacy); also their language. — 7 sentences - [onset](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/onset/) — The onset of something is its start, especially of something bad or unpleasant. — 10 sentences - [onshore](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/onshore/) — On the land, not at sea, as in "onshore wind farms". — 9 sentences - [onside](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/onside/) — In football, rugby and hockey, onside means in a position where you are allowed to play the ball; it is the opposite of offside. — 8 sentences - [onslaught](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/onslaught/) — An onslaught is a fierce, sudden attack, when many people or things rush at once. — 4 sentences - [onward](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/onward/) — Onward means forward, going further on. — 12 sentences - [ooh](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/ooh/) — Ooh is a sound people make to show surprise, delight, interest or admiration. — 10 sentences - [oolong](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oolong/) — A kind of Chinese tea, partly oxidised, between green tea and black tea in taste and colour. — 7 sentences - [ooze](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/ooze/) — verb (of a thick liquid) To flow out slowly: «Honey oozed from the jar». — 9 sentences - [oozing](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oozing/) — Oozing means slowly flowing or leaking out of something, like thick liquid. — 12 sentences - [opal](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opal/) — An opal is a precious stone that shows flashing rainbow colours when you move it in the light. — 11 sentences - [opaque](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opaque/) — Opaque means light cannot pass through it, so you cannot see through it, like wood or a brick wall. — 9 sentences - [open](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/open/) — To open is to move something so you can go in or see inside: open a door, open a box. — 15 sentences - [opener](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opener/) — An opener is a tool for opening something, such as a tin opener, can opener or bottle opener. — 11 sentences - [opening](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opening/) — An opening is a gap or hole that something can pass through. — 14 sentences - [openly](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/openly/) — Openly means in a way that everyone can see or hear, not secretly. — 11 sentences - [opera](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opera/) — An opera is a play in which the actors sing almost all the words, with an orchestra playing music. — 12 sentences - [operate](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/operate/) — To operate a machine is to make it work or control it. — 14 sentences - [operatic](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/operatic/) — To do with opera, plays where all or most of the words are sung, with an orchestra. — 8 sentences - [operating](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/operating/) — Working or running, said of a machine or business. — 11 sentences - [operation](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/operation/) — In maths, an operation is a way of working with numbers: add, subtract, multiply or divide. — 11 sentences - [operative](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/operative/) — Working, in action: «The new system is now operative.». — 10 sentences - [operator](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/operator/) — A person who works a machine or equipment: «a crane operator». — 10 sentences - [opinion](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opinion/) — An opinion is what you think or believe about something; it may not be the same as what others think. — 11 sentences - [opium](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opium/) — A strong, illegal drug made from the juice of a kind of poppy, which makes people sleepy and is very addictive and dangerous. — 9 sentences - [opossum](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opossum/) — An opossum is a North and South American marsupial about the size of a cat, with a pointed white face, bare ears and a long, bare tail tha… — 8 sentences - [opponent](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opponent/) — A person or team that you play, compete or fight against. — 10 sentences - [opportunity](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opportunity/) — An opportunity is a time or situation when it is possible to do something you want or need to do; a chance. — 10 sentences - [opposable](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opposable/) — Able to be placed opposite and pressed against the other fingers, like a human thumb, so that the hand can grip and pick things up. — 7 sentences - [oppose](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oppose/) — To oppose something is to be against it and try to stop it. — 12 sentences - [opposed](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opposed/) — If you are opposed to something, you are against it. — 12 sentences - [opposing](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opposing/) — Being against someone or something in a game, fight or argument (the opposing team). — 10 sentences - [opposite](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opposite/) — The opposite is the thing that is as different as can be: up is the opposite of down. — 13 sentences - [opposition](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/opposition/) — Opposition is strong disagreement with a plan or idea, often shown by speaking or acting against it. — 12 sentences - [oppress](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oppress/) — To oppress people is to treat them cruelly and unfairly, keeping them under hard control. — 4 sentences - [oppressed](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oppressed/) — Treated in a cruel and unfair way by people with power, and not given freedom or rights. — 11 sentences - [oppression](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oppression/) — Oppression is cruel and unfair treatment of people, keeping them down and taking away their freedom. — 4 sentences - [oppressive](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oppressive/) — Cruel and unfair, keeping people down and taking away their freedom: an oppressive ruler. — 10 sentences - [optic](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optic/) — To do with the eye or sight: «the optic nerve». — 12 sentences - [optical](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optical/) — To do with seeing and the eyes. — 8 sentences - [optician](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optician/) — An optician is a person whose job is to test people's eyes and make or sell glasses and contact lenses. — 9 sentences - [optimistic](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optimistic/) — Hopeful and believing good things will happen. — 9 sentences - [option](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/option/) — One of the things you can choose from. — 12 sentences - [optional](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optional/) — Something you can choose to do or have, but you do not have to. — 7 sentences - [optometrist](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/optometrist/) — An optometrist is a person trained to test people's eyesight, check eye health and prescribe glasses or contact lenses. — 7 sentences - [or](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/or/) — Or gives a choice between two or more things: tea or juice? — 21 sentences - [oracle](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oracle/) — In ancient Greece and Rome, a priest or priestess through whom people believed the gods gave advice or told the future, or the holy place… — 10 sentences - [oracular](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oracular/) — Oracular means like an oracle: giving wise-sounding answers or predictions that are often hard to understand. — 4 sentences - [oral](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/oral/) — Oral means spoken, not written: an oral test or an oral report is done by talking. — 11 sentences - [orally](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/orally/) — By speaking, not in writing, as in "answer orally". — 9 sentences [1](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/) **2** [3](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/page/3/) [4](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/page/4/) [5](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/page/5/)