"Oirat" actually means "federation," because this nation was composed of a federation of four Mongolian tribes: the Dzungarians, Torghuts, Khoshuts and Derbets.
所謂「瓦剌」，就是「衛拉特」，它的意義是「結盟」，因為它是由準格爾、土爾扈特、和碩特、及杜爾伯特四個部族聯盟組成的。