Added 9 October 2026 refining noun Categories: ActionsUncommon Words noun ! Definition from WordNet 3.1, Princeton University. More about refining at Wordnik → Where our words come from → The process of removing impurities (as from oil or metals or sugar etc.). Related Words: refinementenhancementextractionfine-tunedevelopmentenhancestreamliningtransformationsophisticationimprovementimprovedimprove Back to today's word