Eagleland Osmosis noun2 •(Internet) A phenomenon in which consumers of American media mistakenly assume that other countries' cultures are similar to that of the United States.It's called Eagleland Osmosis. — 2011 •(nonstandard, rare) The tendency of American culture to spread to other countries.Only in places suffering from Eagleland Osmosis. This sort of construction is normal in most places that speak traditional English. — 2017