Added 9 October 2026 refraction /ɹəˈfɹækʃən/ noun Categories: NatureActionsUncommon Words noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about refraction at Wordnik → Where our words come from → The turning or bending of any wave, such as a light or sound wave, when it passes from one medium into another of different optical density. The degree to which a metal or compound can withstand heat Related Words: deflexiondeflectionrefractivedefeatdiffractiondispersionredirectiondeviationbendingrefrangibilityinflectionoffset Back to today's word