celibate

Short definition from Wiktionary

Adjective

1. 1
   Not married.
2. 2
   Abstaining from sexual relations and pleasures.

Noun

1. 1
   One who is not married, especially one who has taken a religious vow not to get married, usually because of being a member of a religious community.
2. 2
   A celibate state; celibacy.

Verb

1. 1
   To practice celibacy.