noun · 2 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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CMU ARPABET:OW1 V ER0 R IY0 AE2 K SH AH0 N
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
A reaction that is excessive.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Examples
She had every right to dump you, but cutting up all your clothes after she did so was an overreaction.
This whole fear over swine flu was unfounded; it was clearly an overreaction.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
an excessive reaction; a reaction with inappropriate emotional behavior
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: reaction, response
History
Etymology
Etymology tree Proto-Indo-European *úp Proto-Indo-European *-er Proto-Indo-European *upér Proto-Germanic *uber Old English ofer- Middle English over- English over- English reaction English overreaction From over- + reaction.
Across languages
Translations
11 source translations are retained for this English entry.
Chinese Mandarin:
反應過度 /反应过度
(fǎnyìng guòdù)
— reaction deemed excessive