noun ·Uncommon ·Advanced level

Definitions

Noun

1. 1
   Any action that has an influence due to a past event countable, uncountable
2. 2
   An opposing action; a reaction countable, uncountable

Synonyms

All synonyms

action and reactionanswerautomatic reactionautonomic reactionbacksetbacksliding

Etymology

From retro- + action.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.