This is the 1343rd most frequent German word.
österreicher
Austrian (a person from Austria).
Here, 'Österreicher' is used as a noun referring to a male individual from Austria.
Er ist ein Österreicher und stolz auf sein Land.
He is an Austrian and proud of his country.
In this sentence, 'Österreicher' is used as a plural noun referring to the people of Austria collectively.
Die Österreicher sind bekannt für ihre Gastfreundschaft.
The Austrians are famous for their hospitality.
Here, 'Österreicher' serves as a singular masculine noun referring to an Austrian person.