maggie
n. countable A1 Beginner US //ˈmæˌɡi// mag·gie
n. a common short name for Margaret. It is a friendly, informal way to address someone with that name.
n. a female given name, functioning as a diminutive or hypocoristic form of Margaret.
My friend Maggie is coming over for dinner tonight.
After years of being called Margaret at work, she preferred her friends to call her Maggie at home.
While the formal documents listed her as Margaret, she had been known exclusively as Maggie since her early childhood, reflecting the family's preference for informal address.
Usage
Proper noun; typically capitalized. As a diminutive, it carries an informal or familiar register.