Source : Webster's Revised Unabridged Dictionary (1913)

Manchu \Man*chu"\, a. [Written also Manchoo, Mantchoo, etc.]
   Of or pertaining to Manchuria or its inhabitants. -- n. A
   native or inhabitant of Manchuria; also, the language spoken
   by the Manchus.

Source : WordNet®

Manchu
     n 1: a member of the Manchu speaking people of Mongolian race of
          Manchuria; related to the Tungus; conquered China in the
          17th century
     2: the last imperial dynasty of China (from 1644 to 1912) which
        was overthrown by revolutionaries; during the Qing dynasty
        China was ruled by the Manchu [syn: {Qing}, {Qing dynasty},
         {Ch'ing}, {Ch'ing dynasty}, {Manchu dynasty}]
     3: the Tungusic language spoken by the Manchu people