The Collaborative International Dictionary of English v.0.48:

Mongols \Mon"gols\, Mongolians \Mon*go"li*ans\, n. pl. (Ethnol.)
   One of the great races of man, including the greater part of
   the inhabitants of China, Japan, and the interior of Asia,
   with branches in Northern Europe and other parts of the
   world. By some American Indians are considered a branch of
   the Mongols. In a more restricted sense, the inhabitants of
   Mongolia and adjacent countries, including the Burats and the
   Kalmuks.
   [1913 Webster] Mongoose