USAian adjective 1noun 1forms 3 adjective1 •(informal, nonstandard) Of or pertaining to the United States.Back in the '60s and '70s, when I was a wee lad, the economics were such that the Canadian dollar was actually worth a bit more than its USAian counterpart. — 2000 noun1 •(disapproving, nonstandard) A citizen or resident of the United States.That does not mean life as normal, or life as pre-11 Sept. I sincerely hope every USAian has a different perspective now of the world we live in, of the very real threat of terrorism. — 2001 formsUSAians · more USAian · most USAian