aberrant aberrant /ˈæbərənt/

adjective

1. () Markedly different from an accepted norm  ( deviate , aberrant , deviant )
   markedly different from an accepted norm
    Aberrant behavior
   aberrant behavior
    Deviant ideas
   deviant ideas
   

noun

1. One whose behavior departs substantially from the norm of a group  ( aberrant )
   one whose behavior departs substantially from the norm of a group