The Etymology of the word 'Jazz'
The origin of the word jazz has had wide spread interest – the American Dialect Society named it the Word of the Twentieth Century — which has resulted in considerable research, and its history is well documented. The word began [under various spellings] as West Coast slang around 1912, the meaning of which varied but did not refer to music. The use of the word in a musical context was documented as early as 1915 in the Chicago Daily Tribune. Its first documented use in a musical context in New Orleans appears in a November 14, 1916 Times-Picayune article about "jas bands."