out of date prepositional phrase2 •Too old to be used; not current; invalid; having expired.My bus pass is out of date — I'll have to go buy a new one.I can't eat this salad, it's out of date. •Not conforming to the current fashion or style; old-fashioned; outmoded.The dresses she wears are quite out of date. formsmore out-of-date · most out-of-date