of, pertaining to, or exhibiting sexual desire or behavior directed toward a person or persons of one's own sex; homosexual: a gay couple.

of, indicating, or supporting homosexual interests or issues: a gay organization.

having or showing a merry, lively mood: gay spirits; gay music. Synonyms: cheerful, gleeful, happy, glad, cheery, lighthearted, joyous, joyful, jovial; sunny, lively, vivacious, sparkling; chipper, playful, jaunty, sprightly, blithe. Antonyms: serious, grave, solemn, joyless; staid, sedate; unhappy, morose, grim; sad, depressed, melancholy.

bright or showy: gay colors; gay ornaments. Synonyms: colorful, brilliant, vivid, intense, lustrous; glittering, theatrical, flamboyant. Antonyms: dull, drab, somber, lackluster; conservative.

Slang: Often Disparaging and Offensive. awkward, stupid, or bad; lame: This game is really gay.