master race

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A people who consider themselves to be superior to other races and therefore suited to rule over them.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Any race of people who consider themselves to be superior to others; especially when applied to Nazi ideology.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a race that considers itself superior to all others and fitted to rule the others