Webster's English Dictionary

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aberration

ab.er.ra.tion \.ab-*-'ra--sh*n\ \-shn*l, -sh*n-*l\ n [L aberratus, pp. of 
   aberrare] 1: the act 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 heavenly bodies due to the combined effect of the motion of 
   light and the motion of the observer 5: an aberrant organ or individual : 
   SPORT  - ab.er.ra.tion.al aj