[ ˌabə'reɪʃ(ə)n ]
■ noun
1》 an unwelcome deviation from what is normal.
↘ informal a temporary mental lapse.
↘ Biology a characteristic that deviates from the normal type.
2》 Optics the failure of rays to converge at one focus because of a defect in a lens or mirror.
3》 Astronomy the apparent displacement of a celestial object from its true position, caused by the relative motion of the observer and the object.
Derivatives
~al adjective
Origin
C16: from L. aberratio(n-) , from aberrare 'to stray'.