The Collaborative International Dictionary of English v.0.48:

Osmanli \Os"man*li\, n.; pl. Osmanlis. [So called from Osman.
   See Ottoman.]
   A Turkish official; one of the dominant tribe of Turks;
   loosely, any Turk.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Osmanli
    n 1: a Turk (especially a Turk who is a member of the tribe of
         Osman I) [syn: Ottoman, Ottoman Turk, Osmanli]