D defs.my
Entry 3 senses Webster, 1913

Ancestor

/ăn'-sĕsˌ-tẽr/ · An·ces·tor · IPA /ˈæn.sɛs.tɚ/
01 n. One from whom a person is descended, whether on the father's or mother's side, at any distance of time; a progenitor; a fore father.
  1. 1.
    One from whom a person is descended, whether on the father's or mother's side, at any distance of time; a progenitor; a fore father.
  2. 2.
    An earlier type; a progenitor; as, this fossil animal is regarded as the ancestor of the horse.(Biol.)
  3. 3.
    One from whom an estate has descended; -- the correlative of heir.(Law)