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# noxious

«noxious» in Mova's school dictionary: **Harmful or poisonous, especially gases, fumes and chemicals** — its meaning for a pupil, its sense in the lessons and examples.

### part of speech

adjective (noxious; more noxious)

### meaning for a pupil

1) Harmful or poisonous, especially gases, fumes and chemicals. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#m1)

2) Very unpleasant, as in "a noxious smell". [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#m2)

3) (of plants) Harmful weeds that are a pest to farms, as in "noxious weeds" (Australia, US, Canada). [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#m3)

### sense in the lessons

Used in science and safety (noxious gases from cars, factories or fires can make people ill; never mix cleaning products because they can give off noxious fumes) and in stories about smells. In Australia and North America "noxious weeds" are plants landowners must control by law.

### examples

- The factory let out noxious fumes. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x1)
- Never mix bleach with other cleaners; it makes noxious gases. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x2)
- A noxious smell came from the drain. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x3)
- Some plants are listed as noxious weeds. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x4)
- Car exhaust contains noxious gases. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x5)
- The witch stirred a noxious green potion. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x6)
- The firefighters wore masks against the noxious smoke. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x7)
- By the influence of his warm and gentle rays he disperses the noxious vapours of the night, assists the grain to ripen and the flowers to bloom. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x8)

### note

Formal; everyday words: "harmful", "poisonous", "toxic". Pronounced "NOK-shus". Safety: if you smell strong fumes, get to fresh air and tell an adult.

### Trees and pragmatics

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