provincial capital pro·vin·cial·capital uncommon noun 1. the capital city of a province Synonymsprovincial capital Related words Broader terms capitalcity Narrower terms EdmontonVictoriaWinnipegFrederictonSaint John'sHalifaxTorontoCharlottetown WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.