The common definition of celibacy:
abstention from sexual relations.
abstention by vow from marriage: the celibacy of priests.
the state of being unmarried.
1663, formed in Eng. from L. cælibatus "state of being unmarried," from cælebs "unmarried," from PIE base *kaiwelo- "alone" + lib(h)s- "living." Celibate first recorded 1829. - Online Etymology Dictionary
In the esoteric tradition, it is known that there are two forms of celibacy.
Solar celibacy is a positive type of sexual life, in which an individual refrains from sexual union and masturbation, replacing them with spiritual exercises that transmute the sexual matter. Unfortunately, many modern groups have abandoned these types of exercises, so that their celibates no longer have the tools to manage their sexual energy effectively, thus they are practicing the lunar type of celibacy. What modern people usually call "celibacy" is actually a state of sexual repression, called in esotericism "lunar brahmacharya," whose results speak for themselves, with the infamous perversities of priests, monks, and nuns who abuse children and each other, by means of homosexuality and masturbation. In addition, those who repress their sexual forces suffer mental imbalances, leaning towards fanaticism and cruelty. The Inquisition and various types of religious wars stand as clear examples of results of lunar celibacy.