A female partner in an unmarried romantic relationship.
Marc went to the park with his girlfriend and watched the sunset with her.
William Shatner as Capt. James T kirk, Television Program w:Star Trek: The Original Series|Star Trek E01S01, "The Man Trap," w:Paramount Pictures|Paramount Pictures, 1966; Want to pick some flowers, doctor? When a man visits an old girlfriend she usually expects something like that.
A female friend.
Mary always enjoyed hanging out with her girlfriend Jessica.