Source : Webster's Revised Unabridged Dictionary (1913)

Shako \Shak"o\, n. [Hung. cs['a]k['o]: cf. F. shako, schako.]
   A kind of military cap or headdress.

Source : WordNet®

shako
     n : tall hat; worn by some British soldiers on ceremonial
         occasions [syn: {bearskin}, {busby}]
     [also: {shakoes} (pl)]