Definition of big girl in English:

big girl

noun

  • A girl who is relatively old or mature; (also) a girl who is old enough to look after herself or to cope with adult experiences (also (informal) used ironically, of a woman).

Origin

Mid 17th century. From big + girl. Compare earlier big boy.

Pronunciation

big girl

/ˈbɪɡ ˌɡəːl/