expediency ex·pe·diency UK/ɛkˈspiː.dɪ.ən.si/ US/ɪˈkspidiʌnsi/ uncommon obsolete noun 1. the quality of being suited to the end in view Synonymsexpedience Antonymsinexpedience Related words Broader terms advantage WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.