Prag uncommon noun 1. the capital and largest city of the Czech Republic in the western part of the countryi; a cultural and commercial center since the 14th century SynonymsPraguePrahaCzech capital Related words Word family pragmaticpragmaticalpragmaticallypragmaticspragmatic sanctionpragmatismpragmatistPrague Broader terms national capital Parts Czech Republic WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.