Definition of "Gay" :

noun: someone who is sexually attracted to persons of the same sex

adjective: bright and pleasant; promoting a feeling of cheer

"A gay sunny room."

adjective: brightly colored and showy

"A dress a bit too gay for her years."

adjective: homosexual or arousing homosexual desires

adjective: given to social pleasures often including dissipation

"Led a gay Bohemian life."

adjective: offering fun and gaiety

"Gay and exciting night life."

adjective: full of or showing high-spirited merriment

"When hearts were young and gay."