- the action caused by the resistance to another action.
- a return to the opposite physical condition, as after shock, exhaustion, or chill.
Origin of reaction
Related Words for reactionreturn, feedback, attitude, reception, reply, answer, opinion, feeling, backlash, rejoinder, counteraction, backfire, receptivity, wisecrack, acknowledgment, repercussion, lip, take, reflex, kick
Examples from the Web for reaction
Contemporary Examples of reaction
Jundullah and Jaish ul Adl sprang up “in reaction to that kind of oppression,” he said.The Dangerous Drug-Funded Secret War Between Iran and Pakistan
December 29, 2014
No one likes it when their sandcastle is knocked over, but his reaction is a bit, err, extreme.Was Baby Jesus A Holy Terror?
December 21, 2014
For whatever reason, I grew up watching and loving horror movies—perhaps as a reaction to the environment I was growing up in.Tim Burton Talks ‘Big Eyes,’ His Taste For the Macabre, and the ‘Beetlejuice’ Sequel
December 17, 2014
JUDNICK: My reaction is so visceral that I immediately, like you, isolate myself so I can breathe.The Unbearable Whiteness of Protesting
Rawiya Kameir, Judnick Mayard
December 10, 2014
Ultimately, reflecting other people's reaction was highly effective.The Right's Rape Trolls vs. Lena Dunham
December 10, 2014
Historical Examples of reaction
The business world reflects the disturbance of war's reaction.
Her eyes were blazing with an anger the more fierce in that some of it was reaction.The Leopard Woman
Stewart Edward White
I found him under the influence of that reaction which follows the effort of crime.The Secret Agent
I was sure only that they had been through an ordeal and were feeling the reaction.It Happened in Egypt
C. N. Williamson
Then it was that the reaction in favour of Narcisse set in; the boulevards could not stand this.The Cook's Decameron: A Study in Taste:
Mrs. W. G. Waters
- any effect produced by the action of a drug, esp an adverse effectCompare side effect
- any effect produced by a substance (allergen) to which a person is allergic, the simultaneous equal and opposite force that acts on a body whenever it exerts a force on another body
"action in resistance or response to another action or power," 1610s, from re- "again, anew" + action (q.v.). Modeled on French réaction, older Italian reattione, from Medieval Latin reactionem (nominative reactio), noun of action formed in Late Latin from past participle stem of Latin reagere "react," from re- "back" + agere "to do, act" (see act (v.)).
Originally scientific; physiological sense is attested from 1805; psychological sense first recorded 1887; general sense of "action or feeling in response" (to a statement, event, etc.) is recorded from 1914. Reaction time, "time elapsing between the action of an external stimulus and the giving of a signal in reply," attested by 1874.