What does the word abnormal mean?

= abnormal mean: =

Not typical, usual, or regular; not normal; deviant.

different from standard or norm

ALSO:

Departing from the norm, however defined; departing from the mean of a distribution (statistics); departing from the usual, from a state of integration or adjustment.

'Abnormal' has richer meanings than 'unusual'. Its meanings depend very much on context. In clinical medicine, and psychology, abnormal states or symptoms are often warnings of possible trouble. They may be readings (of blood pressure, blood sugar, personality variables) outside the normal range. In research science abnormal suggests questions to ask, and may point to new discoveries.

not normal