Definitions of gay:

• noun:   someone who practices homosexuality; having a sexual attraction to persons of the same sex
• adjective:   homosexual or arousing homosexual desires
• adjective:   given to social pleasures often including dissipation

  Example: "Led a gay Bohemian life"

• adjective:   full of or showing high-spirited merriment

  Example: "When hearts were young and gay"

• adjective:   offering fun and gaiety

  Example: "Gay and exciting night life"

• adjective:   bright and pleasant; promoting a feeling of cheer

  Example: "A gay sunny room"

• adjective:   brightly colored and showy

  Example: "A dress a bit too gay for her years"

• name:  A surname (common: 1 in 6666 families; popularity rank in the U.S.: #774)
• name:  A female given name (rare: 1 in 8333 females; popularity rank in the U.S.: #795)