Inflected forms: pl. chil·dren ( chldrn) 1. A person between birth and puberty. 2a. An unborn infant; a fetus. b. An infant; a baby. 3. One who is childish or immature. 4. A son or daughter; an offspring. 5. A member of a tribe; descendant: children of Abraham.6a. An individual regarded as strongly affected by another or by a specified time, place, or circumstance: a child of nature; a child of the Sixties.b. A product or result of something specified: Times Square is a child of the 20th century (Richard F. Shepard).