ABERRATION

'Aberration' has several meanings:
In 'biology':

★ An abnormality of chromosomes
In 'psychology':

★ A disorder in one's mental state. (see mental illness)
In 'optics':

★ Aberration of light, an astronomical phenomenon which produces an apparent motion of celestial objects

★ Aberration in optical systems, an effect that causes light from one point of an object after transmission through the system to arrive at different points

★ Chromatic aberration, caused by a lens having a different refractive index for different wavelengths of light

★ Defocus aberration, meaning out of focus

★ Spherical aberration, an image imperfection that occurs due to the increased refraction of light rays that occurs when rays strike a lens or mirror near its edge
In 'relativistic theory':

★ Relativistic aberration, a formula relating to the searchlight effect
'Aberration' can also refer to:

★ Aberration (Dungeons & Dragons), a creature type in the role-playing game

★ ''Aberration'' (film), the horror movie