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English definition of “yesterday”

yesterday

adverb     /ˈjes.tə.deɪ/ US  /-tɚ-/
A1 on the day before today: He called yesterday while you were out. I saw her yesterday afternoon.Days, and parts of the weekIn the past
(Definition of yesterday adverb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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