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1. Not normal; not typical, usual, regular or conforming to a norm
   "abnormal amounts of rain"; "an abnormal interest in food"; "abnormal powers of concentration";
   - unnatural
    
2. (psychology) 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, 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