Definition of gay

• someone who practices homosexuality; having a sexual attraction to persons of the same sex
• bright and pleasant; promoting a feeling of cheer; "a cheery hello"; "a gay sunny room"; "a sunny smile"
• full of or showing high-spirited merriment; "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"