Corrections on Webster 1913 definition which has some factual and historical mistakes:
First of all, in 1913 there was no such thing as Turkey or Turkish Empire. The land described was still called Ottoman Empire by the historians. The name Turkey wasn't officially given to the remainders of this empire, until after Turkish War of Independence that was after World War I.
On May 23, 1920, when Mustafa Kemal Ataturk declared the foundation of Turkish Republic by calling up the first Turkish assemby the name was officially used for the first time.
If used as an adjective, the correct term is Turkish, not Turkey. eg: Turkish Carpet, Turkish Stone, Turkish Red, etc.