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We found 21 dictionaries with English definitions that include the word overreaction: Click on the first link on a line below to go directly to a page where "overreaction" is defined. General (17 matching dictionaries) overreaction: Collins English Dictionary [home, info] overreaction: Vocabulary.com [home, info] overreaction: Merriam-Webster's Online Dictionary, 11th Edition [home, info] Overreaction, overreaction: Wordnik [home, info] overreaction: Cambridge Advanced Learner's Dictionary [home, info] overreaction: Wiktionary [home, info] overreaction: Compact Oxford English Dictionary [home, info] overreaction: Dictionary.com [home, info] overreaction: UltraLingua English Dictionary [home, info] overreaction: Cambridge Dictionary of American English [home, info] overreaction: Rhymezone [home, info] overreaction: Free Dictionary [home, info] overreaction: Mnemonic Dictionary [home, info] overreaction: WordNet 1.7 Vocabulary Helper [home, info] overreaction: LookWAYup Translating Dictionary/Thesaurus [home, info] overreaction: Dictionary/thesaurus [home, info] overreaction: Wikimedia Commons US English Pronunciations [home, info] Business (1 matching dictionary) Overreaction: Investopedia [home, info] Medicine (2 matching dictionaries) Overreaction: MedFriendly Glossary [home, info] overreaction: Medical dictionary [home, info] Slang (1 matching dictionary) overreaction: Urban Dictionary [home, info]

Quick definitions from WordNet (overreaction) ▸ noun:  an excessive reaction; a reaction with inappropriate emotional behavior