Celibacy (Brahmacharya) can be defined as an act of abstaining oneself from indulging in any type of sexual activity, speaking or imagining about sex as well as touching others with the intent of sex. Such a person is called celibate (Brahmachari). In general, a person who is not married is often referred to as a celibate.

Brahmacharya has been given great importance in Hinduism. Lord Hanuman and Lord Kartikeya who are important deities of Hindus are celibates and are believed to possess tremendous spiritual powers. Most of the Hindu sages are celibates. It is believed that celibacy increases spiritual power and is the key to advance oneself in the spiritual world. Hanuman is the symbol of celibacy in India. It is believed that it increases physical power also.

Persons who are not married are supposed to observe celibacy. Brahmacharya-Ashrama is the first stage of human life according to Hinduism. Generally, this is a learning phase of life (student life).

Strict celibacy is very difficult to maintain for a common man. Hence, in general, only ascetics observe it.