What is Americanness?

Americanness definition and meaning on Dictionary terms:

of or relating to the United States of America or its inhabitants: an American citizen.
of or relating to North or South America; of the Western Hemisphere: the American continents.
of or relating to the aboriginal Indians of North and South America, usually excluding the Eskimos, regarded as being of Asian ancestry and marked generally by reddish to brownish skin, black hair, dark eyes, and prominent cheekbones.