[ab.er.ra.tion] n [L aberrare] (1594) 1: the fact or an instance of being aberrant esp. from a moral standard or normal state
2: failure of a mirror, refracting surface, or lens to produce exact point-to-point correspondence between an object and its image
3: unsoundness or disorder of the mind
4: a small periodic change of apparent position in celestial bodies due to the combined effect of the motion of light and the motion of the observer
5: an aberrant individual -- ab.er.ra.tion.al adj