Meaning

• (chiefly in plural or attributive) A homosexual, especially a male homosexual; see also lesbian.

• Something which is bright or colorful, such as a picture or a flower.

• An ornament, a knick-knack.

Meaning

• To make happy or cheerful.

• To cause (something, e.g. AIDS) to be associated with homosexual people.

Meaning

• (possibly obsolete) Happy, joyful, and lively.

  "The Gay Science"

• Quick, fast.

• (possibly obsolete) Festive, bright, or colourful.

  "Pennsylvania Dutch include the plain folk and the gay folk."

• Sexually promiscuous (of any gender), (sometimes particularly) engaged in prostitution.

• Homosexual:

• A pejorative:

• (of a dog's tail) Upright or curved over the back.

• (possibly obsolete) Considerable, great, large in number, size, or degree.

Meaning

• (possibly obsolete) Considerably, very.