react
$ \mathrm{react} /riˈækt/
1 intransitive to change or behave in a particular way as a result of or in response to something I nudged her but she didn't react.
You never know how he is going to react.
He would have reacted in the same way.
react to something
Local residents have reacted angrily to the news.
react by doing something
The market reacted by falling a further two points.
[* react to something by doing something
The army has reacted to the situation by increasing investment in recruitment.
react with something
Her family reacted with horror when she told them.
Residents have reacted with fury to the news.
2 intransitive to become ill after eating, breathing, etc. a particular substance react + adv.
Some patients may react adversely.
react (+ adv.) to something
People can react badly to certain food additives.
People react differently to these drugs.
Collocations
adverb
verb + react
preposition
3 intransitive (chemistry) (of substances) to experience a chemical change when coming into contact with another substance Silicon reacts chemically like carbon.
react with something
Iron reacts with water and air to produce rust.
react together
When an acid and an alkali react together the result is a salt and water.
Phrasal Verbs
e.g.