Also Inflected form of healthy healthier healt·hier UK/ˈhɛlθiːə/ US/ˈhɛlθiɚ/ uncommon adjective 1. improved in health or physical condition Synonymsfitter Similarbetter WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.