Definition of american:
"1942, We sat down in the central square and drank coffee and a man came up and spoke to us in American. -- Rebecca West, Black Lamb and Grey Falcon (Canongate 2006, p. 756)"
of or pertaining to the United States of America
, or American culture; of or pertaining to the America
s. More often this is specified as either "North American" or "South American."