Khmer: a member of the majority ethnic group of Cambodia. The term may also be used to describe the language spoken in Cambodia, or the Khmer Empire.
The Khmer Empire (802-1431 A.D.) ruled most of Southeast Asia between the 9th and 12th centuries A.D., and created incredible monuments such as the temple complex at Angkor Wat.
"The Khmer-era temple at Preah Vihear is a source of contention between Cambodia and Thailand."

