The Khalkha (Mongolian: Халх; Khalkh, Halh) is the largest subgroup of Mongol people in Mongolia since the 15th century. The Khalkha, together with Chahars, Ordos and Tumed, were directly ruled by Borjigin khans until the 20th century; unlike the Oirats, who were ruled by Dzungar nobles, or the Khorchins, who were ruled by Qasar's descendants.
Noun 1. the Mongol people living in the central and eastern parts of Outer Mongolia (synonym) Khalka, Kalka (hypernym) Mongol, Mongolian 2. the language of the Khalkha people that is the official language of the Mongolian People's Republic (synonym) Khalka, Kalka (hypernym) Mongolian, Mongolic, Mongolic language