perfect game

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

• noun Baseball A game, especially one pitched by a single pitcher, in which no opposing batter reaches first base.
• noun Sports A game in bowling in which a player bowls 12 successive strikes.

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

• noun baseball A game in which every batter on one team is retired without reaching base.

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

• noun a game in which a pitcher does not allow any opposing player to reach base