abnormal.
Not conforming to rule or system; deviating from the usual or normal type.
Meaning & usage
Not conforming to rule or system; deviating from the usual or normal type.
Of or pertaining to that which is irregular, in particular, behaviour that deviates from norms of social propriety or accepted standards of mental health.
Where this word comes from
Etymology tree Proto-Indo-European *h₂ep Proto-Indo-European *-o Proto-Indo-European *h₂epó Proto-Italic *ap Latin abder. Latin ab-bor. English ab- Proto-Indo-European *ǵneh₃- Proto-Indo-European *-sḱéti Proto-Indo-European *ǵn̥h₃sḱétider. Proto-Hellenic *gignṓskō Ancient Greek γιγνώσκω (gignṓskō) Proto-Indo-European *-mṓ Ancient Greek -μων (-mōn) Ancient Greek γνώμων (gnṓmōn)bor. Etruscanbor.? Latin norma Proto-Indo-European *h₂el- Proto-Indo-European *-is Proto-Indo-European *h₂élisder.? Proto-Italic *-ālis Latin -ālis Latin nōrmālisder. English normal English abnormal From ab- + normal. First attested in 1835, replacing the earlier anormal and even earlier abnormous, from Latin abnormis (“departing from normal”), from either ab- (“away from”) + norma (“rule, norm”), or Ancient Greek ἀνώμαλος (anṓmalos).
A person or object that is not normal.
Where this word comes from
Etymology tree Proto-Indo-European *h₂ep Proto-Indo-European *-o Proto-Indo-European *h₂epó Proto-Italic *ap Latin abder. Latin ab-bor. English ab- Proto-Indo-European *ǵneh₃- Proto-Indo-European *-sḱéti Proto-Indo-European *ǵn̥h₃sḱétider. Proto-Hellenic *gignṓskō Ancient Greek γιγνώσκω (gignṓskō) Proto-Indo-European *-mṓ Ancient Greek -μων (-mōn) Ancient Greek γνώμων (gnṓmōn)bor. Etruscanbor.? Latin norma Proto-Indo-European *h₂el- Proto-Indo-European *-is Proto-Indo-European *h₂élisder.? Proto-Italic *-ālis Latin -ālis Latin nōrmālisder. English normal English abnormal From ab- + normal. First attested in 1835, replacing the earlier anormal and even earlier abnormous, from Latin abnormis (“departing from normal”), from either ab- (“away from”) + norma (“rule, norm”), or Ancient Greek ἀνώμαλος (anṓmalos).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.