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# react

«react» in Mova's school dictionary: **To act, speak or feel in a certain way because of…** — 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

verb (react, reacts, reacted, reacting); noun: reaction

### meaning for a pupil

1) To act, speak or feel in a certain way because of something that has happened (How did she react to the news?). [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/react/#m1)

2) (science) To change when mixed with another substance, making something new (chemical reaction). [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/react/#m2)

3) (health) To become ill or get a rash after eating, touching or breathing something (an allergic reaction). [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/react/#m3)

4) React against: to do the opposite of what you are told or what others do. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/react/#m4)

### sense in the lessons

In science, when vinegar and baking soda react they make carbon dioxide gas (fizzing); iron reacts with water and air to make rust. In feelings lessons, we learn to react calmly — stop, breathe, think — rather than lashing out. In health: some people react badly to peanuts or bee stings, and need help fast. In sport and safety, quick reactions help you dodge a ball or stop your bike. Phrases: react to, react with, react quickly, overreact, allergic reaction.

### examples

- How did your mum react when you told her? [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/react/#x1)
- Vinegar reacts with baking soda and fizzes. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/react/#x2)
- He reacted quickly and caught the falling glass. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/react/#x3)
- Some people react to peanuts and need medicine fast. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/react/#x4)
- Don't react angrily — count to ten first. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/react/#x5)
- Iron reacts with water and air to make rust. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/react/#x6)
- The cat reacted to the noise by hiding under the bed. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/R/react/#x7)

### note

«React to» something (a person reacts to news); «react with» something (a chemical reacts with another). Noun: reaction. «Overreact» = react too strongly.

### In the corpora

- [When you see something upsetting, the body reacts fast: the heart races, the cheeks go hot, you may freeze.](https://md.mova.elamur.ai/free/en/corpora/school/adult-life/58-landing-on-an-18-film-by-accident/12/)
- [A mosquito had dinner while you slept, and the itch is your body reacting to its spit.](https://md.mova.elamur.ai/free/en/corpora/school/biology/399-bites-stings-and-scratches-mosquitoes-wasps-ticks-dog-bites-and-cat-scratches/1/)
- [A bath bomb holds a dry acid and baking soda that react only when water lets them meet, making carbon dioxide bubbles.](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/14/)
- [Toast turns brown because sugars and proteins react into new substances; burnt toast is black because it has partly turned into carbon.](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/9-changes-you-can-and-cannot-undo/11/)
- [Silver tarnishes because it reacts with sulphur gases in the air and makes a thin black layer.](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/14-tarnish-and-how-metals-change/8/)

### Trees and pragmatics

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