ancestor

American  

[an-ses-ter, -suh-ster] / ˈæn sɛs tər, -sə stər /

noun

1. a person from whom one is descended; forebear; progenitor.

2. Biology. the actual or hypothetical form or stock from which an organism has developed or descended.

3. an object, idea, style, or occurrence serving as a prototype, forerunner, or inspiration to a later one.

   The balloon is an ancestor of the modern dirigible.

4. a person who serves as an influence or model for another; one from whom mental, artistic, spiritual, etc., descent is claimed.

   a philosophical ancestor.

5. Law. a person from whom an heir derives an inheritance.

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ancestor British  

/ ˈænsɛstə /

noun

1. (often plural) a person from whom another is directly descended, esp someone more distant than a grandparent; forefather

2. an early type of animal or plant from which a later, usually dissimilar, type has evolved

3. a person or thing regarded as a forerunner of a later person or thing

   the ancestor of the modern camera

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Other Word Forms

• ancestress
  noun

Etymology

Origin of ancestor

1250–1300; Middle English ancestre < Old French (with t developed between s and r ) < Latin antecessor antecessor

Explanation

An ancestor came before. Your grandmother's grandmother and any relative before her is one of your ancestors. Ante-, a common Latin prefix, means "before." Cedere is Latin for "to go." So, an ancestor is someone who has gone before us. Evolutionary biologists have advanced the theory that all life on earth descends from a common ancestor. Ancestor can also mean "prototype" or "forerunner." The abacus is a distant ancestor of today's supercomputers.

Example Sentences

Millions of years later, this ancestor became more active again and returned to a swimming lifestyle.

From Science Daily • Apr. 27, 2026

Again the reigning successor to George III will be obliged to say nice words about the men his ancestor would gladly have hanged from the nearest tree.

From The Wall Street Journal • Apr. 27, 2026

Humans, chimps and bonobos share a common ancestor going back 7 million years or so.

From Salon • Apr. 23, 2026

Both 72, they call the event Los Tradicionales — “the traditional ones” — because their goal is to help preserve Cuba’s rich dance heritage, from rumba to timba to casino, an ancestor of salsa.

From Los Angeles Times • Apr. 4, 2026

And there is a whole subgenre of ancestor research—sons and daughters flying to New York clutching scrapbooks, tracking down letters of indenture, photographs, birth certificates.

From "Orphan Train" by Christina Baker Kline

Related Words

• forebear
• forefather
• founder