/ ˈjestədeɪ; ˈjestədi; NAmE -tərd-/ adverb , noun
■ adverb
on the day before today :
They arrived yesterday.
I can remember our wedding as if it were yesterday.
Where were you yesterday morning?
To think I was lying on a beach only the day before yesterday .
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IDIOMS
see born verb
■ noun [ U ]
1.
the day before today :
Yesterday was Sunday.
What happened at yesterday's meeting?
2.
(also yes·ter·days [ pl. ]) the recent past :
Yesterday's students are today's employees.
All her yesterdays had vanished without a trace.
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WORD ORIGIN
Old English giestran dæg (from yester- Old English geostran , of Germanic origin + day ).