girlfriend
n. countable A1 Beginner Oxford US //ˈɡɝɫˌfɹɛnd// UK //ɡˈɜːlfɹɛnd// girl·friend
n. a woman or girl that someone has a romantic relationship with. You can also use it to describe a female friend.
n. a regular female companion with whom one has a romantic or sexual relationship. In some contexts, it refers to a woman's female friend.
He is going to the cinema with his girlfriend tonight.
She introduced her new girlfriend to her parents during the holiday dinner last week.
Compound of girl + friend.
Usage
Commonly used with possessive adjectives like 'my', 'his', or 'their'.