improving imp·ro·ving UK/ɪmˈpɹuːvɪŋ/ US/ˌɪˈmpruvɪŋ/ fairly common adjective 1. getting higher or more vigorous “its an up market” “an improving economy” Synonymsup Similarrising WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.