Added 10 October 2026 mournfulness noun Categories: FeelingsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about mournfulness at Wordnik → Where our words come from → A state of gloomy sorrow. Related Words: sorrowfulnessruthfulnesslugubriousnessmoodinessmorositylamentabilitylamentablenessremorsefulnessmorosenessdolefulnessdolorousnessmelancholiness Back to today's word