Added 10 October 2026 matt noun Categories: Describing WordsUncommon Words noun ! Definition from WordNet 3.1, Princeton University. More about matt at Wordnik → Where our words come from → The property of having little or no contrast; lacking highlights or gloss. adjective Not reflecting light; not glossy. flat wall paint Related Words: flatflatnessdulllusterlessnessmaxmateokayerindeadlacklustremattiematthew Back to today's word