adverb
- on the day preceding this day.
- a short time ago: Yesterday your money went further.
noun
- the day preceding this day.
- time in the immediate past.
adjective
- belonging or pertaining to the day before or to a time in the immediate past: yesterday morning.
noun
- the day immediately preceding today
- (often plural) the recent past
adverb
- on or during the day before today
- in the recent past
n.Old English geostran dæg, from dæg “day” (see day) + geostran “yesterday,” from Proto-Germanic *gestra- (cf. Old High German gestaron, German gestern “yesterday,” Old Norse gær “tomorrow, yesterday,” Gothic gistradagis “tomorrow”), originally “the other day” (reckoned from “today,” either backward or forward), from PIE *ghes (cf. Sanskrit hyah, Avestan zyo, Persian di, Greek khthes, Latin heri, Old Irish indhe, Welsh doe “yesterday;” Latin hesternus “of yesterday”). see not born yesterday.