# react

Pronunciation: US say "ree-AKT" /ɹiːˈækt/; UK

## Verb

1. To act in response to something that happens or is said.
   - Simple: To do something because of something that just happened.
   - _People react very differently to stress and pressure._
   - _He reacted angrily to the criticism in the meeting._
2. Of chemical substances, to act upon one another and produce a chemical change.
   - Simple: To change into something new when two chemicals come together.
   - _Hydrogen and oxygen react to form water._
   - _Sodium reacts violently when dropped into water._
3. To post an emoji or icon on a message to show how one feels about it.
   - Simple: To tap a small icon showing how you feel about a message online.
   - _Thousands of users reacted to the announcement within minutes._
   - _Friends often react to my posts with laughing faces._
4. To cause one chemical substance to undergo a chemical change with another.
   - Simple: To make one chemical mix and change with another.
   - _Researchers react hydrogen with nitrogen to produce ammonia._
   - _The technician reacted the sample with a reagent to test for starch._
5. To exert an opposing force in response to the action of another body.
   - Simple: To push back against another thing with an equal force.
   - _The ground reacts against your feet with every step you take._
   - _Solid surfaces react to applied loads with an equal and opposite force._

## Noun

6. An emoji added to a social media post to express how one feels about it.
   - Simple: A small emoji you tap on a post to show how you feel about it.
   - _The post collected thousands of reacts overnight._
   - _He dropped a heart react under her photo._

## Verb

7. To perform or carry out something a second time; to enact it again. *(archaic)*
   - Simple: To act out or perform something all over again.
   - _The company reacted the coronation scene to mark the anniversary._
   - _Traveling players would react the same drama in town after town._

## Origin

Formed from the prefix re- combined with 'act'; it is a piecewise doublet of 'redact'.

Source: DictionaryAI, https://dictionaryai.com/define/react (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).