yesteryear UK /ˈjɛstəjɪə/US /ˈjɛstəɹˌjɪ(ə)ɹ/noun 2adverb 1forms 1 noun2 •(literary) Past years; time gone by; yore.It seems to me that it isn't these little acts and little connexions we make in our lives that matter so very much. They pass away, and where are they? Where…Where are the snows of yesteryear? — 1928 •(rare) Last year. adverb1 •(literary) In past years.Was it yesteryear or centuries ago that the Orient Express thundered over that narrow, glistening channel and linked the Golden Horn to the Seine? — 1917 formsyesteryears