What is the meaning of gay?

noun

• Someone who practices homosexuality; having a sexual attraction to persons of the same sex.
  • synonyms: homosexual, homophile, homo

adjective

• Bright and pleasant; promoting a feeling of cheer.
  • usage: "a cheery hello"; "a gay sunny room"; "a sunny smile"
  • synonyms: cheery, sunny
• Full of or showing high-spirited merriment.
  • usage: "when hearts were young and gay"; "a poet could not but be gay, in such a jocund company- Wordsworth; "the jolly crowd at the reunion"; "jolly old Saint Nick"; "a jovial old gentleman"; "have a merry Christmas"; "peals of merry laughter"; "a mirthful laugh"
  • synonyms: jocund, jolly, jovial, merry, mirthful
• Given to social pleasures often including dissipation.
  • usage: "led a gay Bohemian life"; "a gay old rogue with an eye for the ladies"
• Brightly colored and showy.
  • usage: "girls decked out in brave new dresses"; "brave banners flying"; "`braw' is a Scottish word"; "a dress a bit too gay for her years"; "birds with gay plumage"
  • synonyms: brave, braw
• Offering fun and gaiety.
  • usage: "a festive (or festal) occasion"; "gay and exciting night life"; "a merry evening"
  • synonyms: festal, festive, merry
• Homosexual or arousing homosexual desires.
  • synonyms: queer, homophile