bat mitz·vah or bat miz·vah 
(bät mĭtsvə) or bas mitz·vah or bas miz·vah (bäs)Judaism
(bät mĭtsvə) or bas mitz·vah or bas miz·vah (bäs)Judaism n.
1. A Jewish girl of 12 or 13 years of age, considered an adult and responsible for observing religious law.
2. The ceremony that recognizes a girl as a bat mitzvah.
tr.v. bat mitz·vahed, bat mitz·vah·ing, bat mitz·vahs or bat miz·vahed or bat miz·vah·ing or bat miz·vahs or bas mitz·vahed or bas mitz·vah·ing or bas mitz·vahs or bas miz·vahed or bas miz·vah·ing or bas miz·vahs
To recognize as a bat mitzvah.
[Hebrew bat miṣwâ : bat, daughter; see bn in the Appendix of Semitic roots + miṣwâ, commandment; see MITZVAH.]