votary

noun pl. votaries -·ries

1. a person bound by a vow or promise, esp. one bound to religious vows, as a monk or nun
2. a person devoted to a particular religion or object of worship; devout worshiper
3. a devoted or ardent supporter, as of a cause, ideal, etc.
4. a person who is devoted to any game, study, pursuit, etc.

Etymology: < L votus, pp. of vovere, to vow (see vote) + -ary

adjective

1. consecrated by a vow
2. of, or having the nature of, a vow