Meaning

noun a state or condition markedly different from the norm

noun a disorder in one's mental state

noun an optical phenomenon resulting from the failure of a lens or mirror to produce a good image

originA learned borrowing from Latin aberrātiō(n) (“relief, diversion”), first attested in 1594, from aberrō (“wander away, go astray”), from ab (“away”) + errō (“wander”). Compare French aberration. By surface analysis, aberrat(e) + -ion.

Etymology from Wiktionary, CC BY-SA 3.0