abnormal

If you get a snowstorm in the middle of July, you could say that you are experiencing “abnormal weather.” Something that is abnormal is out of the ordinary, or not typical.

Abnormal is a combination of the Latin prefix ab which means “away from,” and the English word normal. It essentially means “not normal,” or "unusual.” Abnormal implies that whatever is “not normal” is also undesirable. However, abnormal is sometimes used in a positive context. The phrase “abnormal intelligence,” for instance, usually refers to someone with especially high intelligence.

Definitions of abnormal
  1. adjective
    not normal; not typical or usual or regular or conforming to a norm
    abnormal powers of concentration”
    abnormal amounts of rain”
    abnormal circumstances”
    synonyms: unnatural
    aberrant, deviant, deviate
    markedly different from an accepted norm
    anomalous
    deviating from the general or common order or type
    antidromic
    conducting nerve impulses in a direction opposite to normal
    atypical, irregular
    deviating from normal expectations; somewhat odd, strange, or abnormal
    brachydactylic, brachydactylous
    having abnormally short finger or toes
    defective
    markedly subnormal in structure or function or intelligence or behavior
    freakish
    characteristic of a freak
    kinky, perverted
    (used of sexual behavior) showing or appealing to bizarre or deviant tastes
    subnormal
    below normal or average
    supernormal
    exceeding the normal or average
    vicarious
    occurring in an abnormal part of the body instead of the usual site involved in that function
    insane
    afflicted with or characteristic of mental derangement
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    Antonyms:
    normal
    conforming with or constituting a norm or standard or level or type or social norm; not abnormal
    average, mean
    approximating the statistical norm or average or expected value
    average, median
    relating to or constituting the middle value of an ordered set of values (or the average of the middle two in a set with an even number of values)
    average, modal
    relating to or constituting the most frequent value in a distribution
    natural
    functioning or occurring in a normal way; lacking abnormalities or deficiencies
    regular
    not deviating from what is normal
    typical
    conforming to a type
    sane
    mentally healthy; free from mental disorder
    standard
    conforming to or constituting a standard of measurement or value; or of the usual or regularized or accepted kind
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  2. adjective
    departing from the normal in e.g. intelligence and development
    “an abnormal personality”
    Synonyms:
    exceptional
    deviating widely from a norm of physical or mental ability; used especially of children below normal in intelligence
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    Antonyms:
    normal
    being approximately average or within certain limits in e.g. intelligence and development
  3. adjective
    much greater than the normal
    abnormal profits”
    abnormal ambition”
    Synonyms:
    immoderate
    beyond reasonable limits
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