Definition of ancestor
1a
: one from whom a person is descended and who is usually more remote in the line of descent than a grandparent
Her ancestors came to America in the 1880s.
2
: forerunner, prototype
an exhibit of the ancestors of the modern computer
3
: a progenitor (see progenitor sense 1b) of a more recent or existing species or group
the ancestor of the modern horse
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Merriam-Webster unabridged
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Time Traveler for ancestor
The first known use of ancestor was in the 14th century
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