/ ˌbæt ˈmɪtsvə; NAmE / (also ˌbas ˈmitzvah ) noun
1.
a ceremony and celebration that is held for a Jewish girl between the ages of 12 and 14 at which she accepts the religious responsibilities of an adult
2.
the girl who is celebrating this occasion
—compare bar mitzvah
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WORD ORIGIN
from Hebrew baṯ miṣwāh daughter of commandment, feminine form of bar mitzvah .