A yogi is a practitioner of Yoga, including a sannyasin or practitioner of meditation in Indian religions. The feminine form, sometimes used in English, is yogini.
Bronze figure of a Yogi in Dhyana (meditation) by Malvina Hoffman
A 10th-century Yogini statue from Tamil Nadu, India. She is seated in an asana, and her eyes are closed in meditative state.
A sculpture of Gorakhnath, a celebrated yogi of Nath tradition and a major proponent of Hatha yoga.
17th century Hindu female Nath yogis. The earliest records mentioning female Nath yogis (or yogini) trace to 11th century.
Yoga is a group of physical, mental, and spiritual practices or disciplines which originated in ancient India and aim to control (yoke) and still the mind, recognizing a detached witness-consciousness untouched by the mind (Chitta) and mundane suffering (Duḥkha). There is a wide variety of schools of yoga, practices, and goals in Hinduism, Buddhism, and Jainism, and traditional and modern yoga is practiced worldwide.
Statue of Shiva performing yoga in the lotus position
A statue of Patanjali, author of the Yoga Sutras of Patanjali, meditating in the lotus position
Bas-relief in Borobudur of the Buddha becoming a wandering hermit instead of a warrior
Krishna narrating the Bhagavad Gita to Arjuna