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Synonyms

react

American  
[ree-akt] / riˈækt /

verb (used without object)

  1. to act in response to an agent or influence.

    How did the audience react to the speech?

  2. to act reciprocally upon each other, as two things.

  3. to act in a reverse direction or manner, especially so as to return to a prior condition.

  4. to act in opposition, as against some force.

  5. to respond to a stimulus in a particular manner.

    reacting to a shock by jumping; to react to the word “coward” with anger.

  6. to undergo a chemical reaction.


react British  
/ rɪˈækt /

verb

  1. (intr; foll by to, upon etc) (of a person or thing) to act in response to another person, a stimulus, etc, or (of two people or things) to act together in a certain way

  2. to act in an opposing or contrary manner

  3. (intr) physics to exert an equal force in the opposite direction to an acting force

  4. chem to undergo or cause to undergo a chemical reaction

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of react

First recorded in 1635–45; re- + act, probably modeled on Medieval Latin reagere

Explanation

When you react to something, you respond to it. If someone pokes you in class, you might react by sticking out your tongue at them. The teacher might then react by giving you both detention. If someone says to you, "act, don't react," they are telling you not to automatically respond to something that someone does. Instead, you should think about it first and then decide what you want to do. In science, the word react is used to describe what happens when two substances combine and cause a chemical change in each other. When you add baking soda to vinegar, the chemicals in each react and create a foamy lava like substance.

Keep Reading on Vocabulary.com

Vocabulary lists containing react

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In June, he published “How We Built Hydrogen: A React Framework for Building Custom Storefronts,” a behind-the-scenes look at how Shopify built a new set of tools for developers.

From New York Times • Jan. 7, 2023

Discord is switching to React Native on Android Discord is switching to React Native for its Android app, which will allow the company to roll out new features across every platform simultaneously.

From The Verge • Aug. 1, 2022

React how you like to these vertiginous prices for rising stars — though remember, the young artists don’t get a cut of auction flips.

From New York Times • May 23, 2022

On 31 March, an estimated 8.31% of the over-55 age group would have tested positive, according to the data - nearly 20 times the average prevalence recorded since the React survey started in May 2020.

From BBC • Apr. 5, 2022

When I walk onto the court I prefer silence so I can Watch React Surprise.

From "The Crossover" by Kwame Alexander