yesterday adjective - Definition, pictures, pronunciation and usage notes | Oxford Advanced American Dictionary at OxfordLearnersDictionaries.com

Definition of yesterday adjective from the Oxford Advanced American Dictionary

yesterday

adjective

NAmE//ˈyɛstərˌdeɪ//

, NAmE//ˈyɛstərdi//

[not before noun] (informal) (often humorous)

no longer fashionable or new E-mail—that's so yesterday! PCs are so yesterday.

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