reaction

Meaning

1. An action or statement in response to a stimulus or other event.
2. A transformation in which one or more substances is converted into another by combination or decomposition.
3. Reactionary politics; a period in which reactionary thought or politics is resurgent or dominant.
4. Unpurposeful behavior.
5. An icon or emoji appended to a posted message by a user to express their feeling about it.

Concepts

reaction

response

reply

answer

feedback

counteraction

echo

rejoinder

influence

repercussion

recoil

reactive

retort

secondary effect

side effect

recovery

counterforce

reflex

chemical reaction

reactionary

consequence

consistency

comeback

crackdown

cue

rebuttal

refutation

replica

relaying

behavior

resistance

reverberation

kick

return

adverse effect

reflection

repercussions

attitude

manner

rapid movement of the muscle

kickback

backlash

involuntariness

symtom

comment

reactionary tendency

reception

action

effect

rebound

counteracting force

reacting force

reaction force

reactive force

opposite force

back radiation

reradiation

react

reacting

back coupling

backfeed

bussback

couple back

flyback

load-back

return coupling

tickling

ultramagnifier

remedy

countermeasure

reprisal

reactionism

plea

antagonism

balkiness

discouragement

snub

resonance

extreme conservatism

Pronounced as (IPA)

/ɹiˈækʃən/

Etymology

Inherited from Middle English reaccion, from Old French reaction, from Latin reāctiō, from the verb reagō, from re- (“again”) + agō (“to act”); more at re-, action; equivalent to react + -ion.