Gay

1. (chiefly in plural or attributive) A homosexual, especially a male homosexual; see also lesbian.
2. Something which is bright or colorful, such as a picture or a flower.
3. An ornament, a knick-knack.

1. To make happy or cheerful.
2. To cause (something, e.g. AIDS) to be associated with homosexual people.

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

   The Gay Science

2. Quick, fast.
3. (possibly obsolete) Festive, bright, or colourful.

   Pennsylvania Dutch include the plain folk and the gay folk.

4. Sexually promiscuous (of any gender), (sometimes particularly) engaged in prostitution.
5. Homosexual:
6. A pejorative:
7. (of a dog's tail) Upright or curved over the back.
8. (possibly obsolete) Considerable, great, large in number, size, or degree.

adverb

(possibly obsolete) Considerably, very.

noun

The letter —, which stands for the sound /ɡ/, in Pitman shorthand.