Pants are apparel bottoms that have material which covers the entire leg, down to the ankle.
Shorts are apparel bottoms that have material cut short above the knee or slightly below the knee.
About Yoga Bottoms:
Yoga bottoms are bottoms specifically designed for ease and comfort while participating in the sport of yoga. Yoga bottoms are most often made from lightweight fabrics with high wicking ability and breathability to provide comfort, as well as stretch for ease of movement.