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# ruler

«ruler» in Mova's school dictionary: **a straight strip with marks, used to measure length and…** — its meaning for a pupil, its sense in the lessons and examples, with 5 sentences of Mova's corpora that use it.

### part of speech

noun (ruler, rulers)

### meaning for a pupil

1) A ruler is a straight strip with marks, used to measure length and draw straight lines. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/ruler/#m1)

2) A ruler is also a person who rules a country, like a king, queen or emperor. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/ruler/#m2)

### sense in the lessons

In maths: a measuring tool, usually 12 inches or 30 centimeters; rulers counted and bought; measuring from zero. In science and D&T: measuring lengths in mm and cm. In history and stories: rulers of kingdoms and empires, wise and cruel rulers.

### examples

- A ruler is 30 cm long. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/ruler/#x1)
- How many rulers fit along a 2 m table? [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/ruler/#x2)
- Each ruler costs $1.50. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/ruler/#x3)
- She measured the line with a ruler: 8 inches. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/ruler/#x4)
- Use a ruler to draw a straight line. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/ruler/#x5)
- Start measuring from the zero mark on the ruler. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/ruler/#x6)
- The ruler of the kingdom was a wise old queen. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/ruler/#x7)
- My ruler has centimeters on one side and inches on the other. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/ruler/#x8)
- Rulers of ancient Egypt were called pharaohs. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/ruler/#x9)
- She was a wonderful woman, and an able ruler. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/ruler/#x10)

### note

A ruler often hides a length (12 inches = 1 foot, 30 cm). Trap: start measuring at the 0 mark, not at the very end of the ruler. A meter stick (USA: yardstick, 3 feet) is a long ruler. Trap: a «ruler» in a history text is a person, not a tool.

### In the corpora

- [When two lines look different in length, measure them with a ruler, because the brain can be fooled by their surroundings.](https://md.mova.elamur.ai/free/en/corpora/school/everyday/280-illusions-and-adverts/15/)
- [In the Müller-Lyer illusion, two equal lines look different lengths because of the arrow ends; a ruler shows the truth.](https://md.mova.elamur.ai/free/en/corpora/school/everyday/313-kind-jokes-pranks-april-fools-and-adverts/6/)
- [He froze — and then quietly slid the sandwich away with a ruler.](https://md.mova.elamur.ai/free/en/corpora/school/everyday/366-sam-is-scared-fear-is-normal/15/)
- [Tom flicked his ruler at Lily to make his mates laugh; it caught the corner of her eye.](https://md.mova.elamur.ai/free/en/corpora/school/everyday/390-showing-off/8/)
- [Flicking rulers or throwing things near faces can injure eyes.](https://md.mova.elamur.ai/free/en/corpora/school/everyday/390-showing-off/28/)

### Trees and pragmatics

[Every meaning and example of «ruler» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/ruler/), each sentence with its dependency tree and frames.