- the action caused by the resistance to another action.
- a return to the opposite physical condition, as after shock, exhaustion, or chill.
- reaching jib,
- reaction chamber,
- reaction engine,
- reaction formation,
- reaction of degeneration,
- reaction time
Origin of reaction
Examples from the Web for 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|Umar Farooq|December 29, 2014|DAILY BEAST
No one likes it when their sandcastle is knocked over, but his reaction is a bit, err, extreme.
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|Marlow Stern|December 17, 2014|DAILY BEAST
JUDNICK: My reaction is so visceral that I immediately, like you, isolate myself so I can breathe.
Ultimately, reflecting other people's reaction was highly effective.
Happie cried, crimson with anger and the reaction from her fright.Six Girls and Bob|Marion Ames Taggart
When the experiment is finished, I first look over the general course of the reaction times.Collected Papers on Analytical Psychology|C. G. Jung
When the French Revolution broke out, the reaction became, for an interval, in many quarters far stronger still.The English Church in the Eighteenth Century|Charles J. Abbey and John H. Overton
Then the reaction came, and he hated the very sound of their voices.For the Term of His Natural Life|Marcus Clarke
I fell beneath a reaction of feelings too powerful for human nature to struggle with.The Mysteries of London, v. 1/4|George W. M. Reynolds
- 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.