Definitionen
1.NounOne from whom a person is descended, whether on the father's or mother's side, at any distance of time; a progenitor; a forefather; a forebear.
2.NounAn earlier type; a progenitor."This fossil animal is regarded as the ancestor of the horse."
3.NounOne from whom an estate has descended;—the correlative of heir.
4.NounOne who had the same role or function in former times.
5.NounA word or phrase which serves as the origin of a term in another language.
6.VerbTo be an ancestor of.