From Longman Dictionary of Contemporary Englishaberrationab‧er‧ra‧tion /ˌæbəˈreɪʃən/ noun [countable] formal MISTAKEan action or event that is very different from what usually happens or what someone usually does a temporary aberration in US foreign policy a mental aberration
Examples from the Corpus
aberration• The losses this year are an aberration, and the company will continue to grow.• The Tories regard it as an aberration that would be catastrophic for Britain's system of government.• That last kiss had been a mistake, an aberration.• In light of his often-brilliant and incident-free 1995-96 season, the previous year was quickly ruled an aberration.• This psychoanalysis of the Enlightenment obviously concentrated only on its darker side, its errors, aberrations and absurdities.• The implication was clear: to discuss Article 6 would be an irresponsible aberration.• And any such aberration includes a nervous disposition toward children. 