Muay Thai, sometimes referred to as “Thai boxing,” is a martial art and combat sport that uses stand-up striking along with various clinching techniques. This discipline is known as the “art of eight limbs,” as it is characterized by the combined use of fists, elbows, knees, and shins.

Muay Thai became widespread internationally in the late 20th to 21st century, when Westernized practitioners from Thailand began competing in kickboxing and mixed-rules matches as well as matches under Muay Thai rules around the world.

The professional league is governed by The Professional Boxing Association of Thailand (P.A.T), sanctioned by The Sports Authority of Thailand (S.A.T.).
Source: Wikipedia