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1. Not normal; not typical or usual or regular or conforming to a norm
   "abnormal powers of concentration"; "abnormal amounts of rain"; "abnormal circumstances"; "an abnormal interest in food"
   - unnatural
    
2. Departing from the normal in e.g. intelligence and development
   "they were heartbroken when they learned their child was abnormal"; "an abnormal personality"
    
3. Much greater than the normal
   "abnormal profits"; "abnormal ambition"

See also: aberrant, abnormality, abnormally, anomalous, antidromic, atypical, brachydactylic, brachydactylous, defective, deviant, deviate, exceptional, freakish, immoderate, insane, irregular, kinky, normalcy [N. Amer], normality, perverted, subnormal, supernormal, vicarious

Antonym: normal

Encyclopedia: Abnormal