1792, "an Ottoman Turk," especially a member of the ruling dynasty; as an adjective by 1829, "relating to the empire of Turkey," from Turkish Osmanli "of or pertaining to Osman," founder of the Ottoman dynasty (he reigned 1259-1326); his name is the Turkish pronunciation of Arabic Uthman. This is the native word where English generally uses Ottoman. In early use as a noun in English often mistakenly regarded as a plural.

updated on October 05, 2019

Definitions of Osmanli from WordNet

Osmanli (n.)
a Turk (especially a Turk who is a member of the tribe of Osman I);
Synonyms: Ottoman / Ottoman Turk
From, not affiliated with etymonline.