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

adj 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”
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
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
show more antonyms...

adj departing from the normal in e.g. intelligence and development

“they were heartbroken when they learned their child was abnormal
“an abnormal personality”
Synonyms:
exceptional
deviating widely from a norm of physical or mental ability; used especially of children below normal in intelligence
Antonyms:
normal
being approximately average or within certain limits in e.g. intelligence and development

adj much greater than the normal

abnormal profits”
abnormal ambition”
Synonyms:
immoderate
beyond reasonable limits

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