aberration aberration /ˌæbəˈreɪʃən/

noun

1. () A state or condition markedly different from the norm  ( aberrance , aberrancy , deviance , aberration , deviancy )
   a state or condition markedly different from the norm
   
2. An optical phenomenon resulting from the failure of a lens or mirror to produce a good image  ( aberration , optical aberration , distortion )
   an optical phenomenon resulting from the failure of a lens or mirror to produce a good image
   
   
3. A disorder in one's mental state  ( aberration )
   a disorder in one's mental state