1. show a response or a reaction to something

Similar word(s): respond

Definition categories: cognition, act, move

2. act against or in opposition to

- She reacts negatively to everything I say

Similar word(s): oppose

Definition categories: social, act, move

3. undergo a chemical reaction; react with another substance under certain conditions

- The hydrogen and the oxygen react

Definition categories: change, turn

Sentences with react as a verb:

- to react a play; the same scenes were reacted at Rome