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English definition of “aberration”

aberration

noun [C or U] uk   /ˌæb.əˈreɪ.ʃən/ formal us  
a temporary change from the typical or usual way of behaving: In a moment of aberration, she agreed to go with him. I'm sorry I'm late - I had a mental aberration and forgot we had a meeting today.
(Definition of aberration from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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