Yes I know what they want to mean, nevertheless the real name of that country is just “United States of America” not “America”, and your passports say “citizen of USA” not “American”. As far as I know, many “americans” would like to say “The World” to refer to their country.

I am part of America too, and an “american” as you are, don’t try to appropiate the word -and the world- just for yourselves.