Did you know?

Click any word in a definition or example to find the entry for that word

react - definition and synonyms

 
 
Close

What are red words?

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.

Close

Thesaurus

The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.

more
verb [intransitive] react pronunciation in British English /riˈækt/
Word Forms
Close
present tense
I/you/we/theyreact
he/she/itreacts
present participlereacting
past tensereacted
past participlereacted
  • Facebook
  • Twitter
  1. 1
    to behave in a particular way because of something that is happening around you or something that someone is doing to you
    I wasn’t sure how you would react.
    react to: The financial markets reacted badly to the latest news on inflation.
    Workers reacted angrily to the news of more job losses at the factory.
    react by doing something: When the parliament formally criticized him, Yeltsin reacted by threatening to close it down.
    react accordingly/appropriately: The software enables the computer to interpret messages and react accordingly.
  2. 2
    chemistry if a chemical substance reacts with another substance, it changes as they are mixed together
    react with: Car emissions react with sunlight to form ozone.
  3. 3
    to become ill when you eat a particular food or take a particular drug
    react to: Some children react badly to antibiotics.

phrasal verbs

brinner

a meal served in the evening which consists of foods traditionally eaten at breakfast

BuzzWord Article

Open Dictionary

troll factory

a company that pays its employees to write online comments in favour or against somebody or something posing as ordinary Internet users

add a word

Blog

A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.

global English and language change from our blog