Definition of aberrant adjective from the Oxford Advanced Learner's Dictionary

 

aberrant

 adjective
adjective
BrE BrE//æˈberənt//
 
; NAmE NAmE//æˈberənt//
 
(formal)
 
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not usual or not socially acceptable aberrant behaviour Word Origin mid 16th cent.: from Latin aberrant- ‘wandering away’, from the verb aberrare, from ab- ‘away, from’ + errare ‘to stray’.Extra examples The aim is to find the cause of the child’s aberrant behaviour. The waiter’s manner suggested that vegetarianism was aberrant and therefore embarrassing. The word ‘street’as in ‘street crime’ is used as a metaphor for what is aberrant and fearful in the light of social norms.
See the Oxford Advanced American Dictionary entry: aberrant