male (me?l) n. 1. a person bearing an Xand Ychromosome pair in the cell nuclei and normally having a penis, scrotum, and testicles and developing hair on the face at adolescence; a boy or man. 2. an organism of the sex or sexual phase that normally produces a sperm cell or male gamete. 3. a plant having a stamen or stamens. adj. 4. of, pertaining to, or being a male: the male skeleton; a male squirrel. 5. of, pertaining to, or characteristic of a boy or man; masculine: the male ego. 6. composed of males: a male choir. 7. a. of or pertaining to a plant or its reproductive structure producing or containing microspores. b. (of seed plants) staminate. 8. made to fit into a corresponding open or recessed part: a male plug. [1300?50; Middle English