euphonious UK /juːˈfəʊ.nɪ.əs/US /juˈfoʊ.ni.əs/ adjective1 •Of sounds, especially speech: demonstrating or possessing euphony; agreeable to the ear; pleasant-sounding.Before I set forward on my travels, I chose to change my name from Collier to Coglioni or Collioni, as more euphonious; […] — 1775 formsmore euphonious · most euphonious