IPA: /ˌæbəˈreɪʃən/
KK: /ˌæbəˈreɪʃən/
A situation or event that is different from what is usual or expected, often seen as a mistake or an unusual occurrence.
The sudden drop in temperature was an aberration in the otherwise warm weather pattern.
Aberration → It is formed from "ab-" (meaning away from) and "errare" (meaning to wander or stray). The word describes a deviation from the normal or typical path, suggesting a wandering away from what is expected.
Think of something that 'strays away' ('ab-') from the usual course or norm — that's what aberration means.