1. all future generations of people: "the victims' names are recorded for posterity"Similarfuture generationssucceeding generationsthose who come after usthe future
▪ the descendants of a person:"God offered Abraham a posterity like the stars of heaven"Similardescendantsheirssuccessorsoffspringchildrenfamilyprogenyscionsissuearchaic:seed
Word Originlate Middle English: from Old French posterite, from Latin posteritas, from posterus ‘following’.