Yoga: a Hindu discipline (Websters Dictionary)

Yoga: a school of Hindu philosophy advocating and prescribing a course of physical and mental disciplines for attaining liberation from the material world and union of the self with the Supreme Being or ultimate principle (Websters Dictionary)

Yoga is a sanskrit word which is actually pronounced: [Yog-Uh]. Yoga is a discipline which was first found in the Vedas and they were extracted by the great Rishi Patanjali. Sri Krishna is the one who explained Yoga in the Bhagavad Gita. Yoga is believed [by Hindus] to be the ultimate way to liberation.

The four main Yogas are:

- Raja Yoga (Yoga of meditation or rather all Yogas fused together)
- Jnana Yoga (Yoga of knowledge)
- Karma Yoga (Yoga of Action)
- Bhakti Yoga (Yoga of Devotion)

Raja Yoga (Ashtanga Yoga - Eight Limbed Yoga):

Yama [moral codes]
Niyama [self-purification and study]
Asana [posture]
Pranayama [breath control]
Pratyahara [sense control]
Dharana [concentration]
Dhyana [meditation]
Samadhi [contemplation]