Khmer can mean, the:

• Khmer people, the ethnic group to which the great majority of Cambodians belong
• Khmer language
• Khmer Empire, which ruled over much of Indochina from the 9th to the 13th centuries. (See also: Angkor)
• Khmer Rouge, a Cambodian Communist political group and guerilla movement.
• Khmer alphabet
• Khmer Republic, the name of Cambodia from 1975 to 1980