WordWeb Online

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

Derived forms: aberrations

Type of: abnormalcy [US], abnormality, disturbance, folie, mental disorder, mental disturbance, optical phenomenon, psychological disorder

Encyclopedia: Aberration, optical