girlfriend
1. A female romantic partner. Have you met my girlfriend, Kelly? We've only been on two dates, so I wouldn't say she's my girlfriend or anything.
2. A female's female friend. Can be used as a term of address between females. I'm taking my daughter and a few of her girlfriends to a concert tonight. Hey, girlfriend! How are you?
3. slang A term of address used by a gay man for another gay man. Oh, girlfriend, no—you cannot choose that color of paint.