A yogi (Sanskrit, feminine root: yogini) is a term for a male practitioner of various forms of spiritual practice. In contemporary English yogin is an alternative rendering for the word yogi.
In Hinduism it refers to an adherent of Yoga. The word is also often used in the Buddhist context to describe Buddhist monks or a householders devoted to meditation. Chatral Rinpoche for example is a famous wandering yogi from Tibet.

The Shiva-Samhita text defines the yogi as someone who knows that the entire cosmos is situated within his own body, and the Yoga-Shikha-Upanishad distinguishes two kinds of yogins: those who pierce through the "sun" (surya) by means of the various yogic techniques and those who access the door of the central conduit (sushumna-nadi) and drink the nectar.