aberration
/ˌæbəˈreɪʃən/noun
1- a departure from what is normal, usual, or expected, typically one that is unwelcome（对正常、一般或预期情况的）偏离, 偏差：
they described the outbreak of violence in the area as an aberration.
他们将这一地区出现的暴力行为描述为异常现象。
1.1
- a person whose beliefs or behaviour are unusual or unacceptable信仰（或行为）异常的人：
evil men are an aberration.
邪恶之徒是行为异常的人。
1.2
- a departure from someone's usual moral character or mental ability, typically for the worse精神失常：
I see these activities as some kind of mental aberration.
我认为这些行为是某种精神失常。
1.3
- Biology a characteristic that deviates from the normal type【生】（偏离常规类型的）畸变, 变型：
colour aberrations.
色差。
1.4
- Optics the failure of rays to converge at one focus because of a defect in a lens or mirror【光学】像差。
1.5
- Astronomy the apparent displacement of a celestial object from its true position, caused by the relative motion of the observer and the object【天文】光行差。
派生词
aberrational
adjective词源
late 16th cent.: from Latin aberratio（n-）, from aberrare 'to stray' （see ABERRANT）.