English Lexicon

Reaction

/riˈækʃən/
nounCEFR B2 (Upper)Top #800 frequency
Full Thesaurus

Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    A response to a stimulus or an event.

    "Her reaction to the surprise party was one of sheer joy."
  2. 2

    A chemical process in which substances interact to form new substances.

    "The reaction between vinegar and baking soda produces carbon dioxide."

Thesaurus & Semantic Spectrum

Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

The word 'reaction' originates from the Latin 'reactio', which means 'a doing again'. It entered Middle English through Old French in the late 14th century, evolving to denote a response to an action or stimulus.

Quick Vocabulary Retention Check

Which of the following is the closest synonym for "Reaction"?

Thesaurus & Synonyms Graph

Explore Nuanced Synonyms for "Reaction"

Discover exact matches, context-specific alternatives, and antonyms with intensity ratings in the VocabDictionary Thesaurus.

View "Reaction" Synonym Map