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Definition of Abnormal
1. Adjective. Not normal; not typical or usual or regular or conforming to a norm. "An abnormal interest in food"
Exact synonyms: Unnatural
Attributes: Normalcy, Normality
Similar to: Aberrant, Deviant, Deviate, Anomalous, Antidromic, Atypical, Irregular, Brachydactylic, Brachydactylous, Defective, Freakish, Kinky, Perverted, Subnormal, Supernormal, Vicarious
Also: Insane
Derivative terms: Abnormality, Abnormality
Antonyms: Normal
Attributes: Normalcy, Normality
Similar to: Aberrant, Deviant, Deviate, Anomalous, Antidromic, Atypical, Irregular, Brachydactylic, Brachydactylous, Defective, Freakish, Kinky, Perverted, Subnormal, Supernormal, Vicarious
Also: Insane
Derivative terms: Abnormality, Abnormality
Antonyms: Normal
2. Adjective. Departing from the normal in e.g. intelligence and development. "An abnormal personality"
Category relationships: Psychological Science, Psychology
Similar to: Exceptional
Derivative terms: Abnormality
Antonyms: Normal
Similar to: Exceptional
Derivative terms: Abnormality
Antonyms: Normal
3. Adjective. Much greater than the normal. "Abnormal ambition"
Similar to: Immoderate
Definition of Abnormal
1. a. Not conformed to rule or system; deviating from the type; anomalous; irregular.
Definition of Abnormal
1. a mentally deficient person [n -S]
Medical Definition of Abnormal
1. Not normal, contrary to the usual structure, position, behaviour or rule. (06 Oct 1997)