bat mitzvah /ˌbɑːt ˈmɪtsvə/ BrE AmE noun [countable]
[ Date: 1900-2000 ; Language: Hebrew ; Origin: bath miswah 'daughter of (God's) law' ]
1 . a religious ceremony held when a Jewish girl reaches the age of 13 and is considered an adult in her religion ⇨ bar mitzvah
2 . a girl for whom this ceremony is held