yesterday UK /ˈjɛstədeɪ/US /ˈjɛstɹdeɪ/adverb 2noun 2forms 1 adverb2 •on the day just before the present oneI started to watch the video yesterday, but could only finish it this evening. •(informal) As soon as possible.I want this done yesterday!I need it yesterday! noun2 •The day immediately before today; one day ago.Today is the child of yesterday and the parent of tomorrow.Yesterday was rainy, but by this morning it had begun to snow. •(figurative) The past, often in terms of being outdated.yesterday's technologyThe worker of today is different from that of yesterday. formsyesterdays
