Definition of ancestor in English:


Syllabification: an·ces·tor
Pronunciation: /ˈanˌsestər


1A person, typically one more remote than a grandparent, from whom one is descended: my ancestor Admiral Anson circumnavigated the globe 250 years ago
More example sentences
  • A smaller unit is the lineage, a kin group of four or five generations descended from a male ancestor traced though the male line.
  • Yet evolution predicts not just successions of forms, but also genetic lineages from ancestors to descendants.
  • The family unit has at its head the ancestors followed by the grandparents, the father, the wives and then the children.
1.1An early type of animal or plant from which others have evolved.
More example sentences
  • It is generally accepted that all multicellular animals have evolved from a common ancestor, which itself evolved from a single-celled organism.
  • There are two main types, the dome heads and the horned dinosaurs, which evolved from a common ancestor during the early Cretaceous.
  • Finally we get to the common ancestor of all animals, plants, protists, and fungi.
1.2An early version of a machine, system, etc. this instrument is an ancestor of the lute
More example sentences
  • This solution is the ancestor of many versions of platonism in mathematics.
  • The oud is a popular instrument; it is an ancient stringed instrument that is the ancestor of the European lute.
  • An ancient stringed instrument, it is an ancestor of the European lute.


Middle English: from Old French ancestre, from Latin antecessor, from antecedere, from ante 'before' + cedere 'go'.

Definition of ancestor in: