khmer noun orkmer\kəˈme(ə)r\ (pluralkhmerorkhmersorkmerorkmers) Usage: usually capitalized 1. a.: an aboriginal people of Cambodia noted for their architectural achievements < the mighty Khmer empire … ruled most of Indo-China and bequeathed the matchless jungle temple of Angkor Wat to posterity — Time > b.: a member of such people 2.: a Mon-Khmer language of the Khmer people that is the official language of Cambodia • khmeri·an\-merēən, -mir-\adjective, usually capitalized