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overreact

American  
[oh-ver-ree-akt] / ˌoʊ vər riˈækt /

verb (used without object)

overreacts, present (3rd person singular) overreacted, past participle, past overreacting present participle
  1. to react or respond more strongly than is necessary or appropriate.


overreact British  
/ ˌəʊvərɪˈækt /

verb

  1. (intr) to react excessively to something

"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

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Etymology

Origin of overreact

First recorded in 1960–65; over- + react

Explanation

To overreact is to respond to something in an overly excited, angry, or fearful way. If you're pretty sure your dad will overreact when he hears about your fender bender, you might want to tell your mom first. Whenever someone reacts more emotionally than seems appropriate, they overreact. You might overreact to a happy plot twist in your favorite TV show by cheering and jumping up and down — and a city bus driver might overreact to a passenger listening to loud music by pulling the bus over to the side of the road and turning to yell angrily. Overreact was first used in the 1960s, probably by historian and literary critic Lewis Mumford.

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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.

She makes some insufficiently careful decisions, but those around her tend to overreact.

From Los Angeles Times • Jun. 12, 2026

Nutrition experts commenting on the research have also urged people not to overreact.

From Science Daily • May 24, 2026

Like Wilkerson said—investors still need to pay attention, but they don’t have to overreact.

From Barron's • May 7, 2026

"I did overreact, yes, in the way I reacted. It could have been different but I ended up losing my head," added Neymar.

From BBC • May 6, 2026

“It’s just a meeting, y’all, I promise. It’s not even the actual protest. Even then...we should probably wait to overreact until we know what it is this protest will even be.”

From "Anger Is a Gift" by Mark Oshiro

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