Added 9 October 2026 religiousness noun Categories: Describing WordsRare Words noun ! Definition from WordNet 3.1, Princeton University. More about religiousness at Wordnik → Where our words come from → Piety by virtue of being devout. The quality of being extremely conscientious. his care in observing the rules of good health amounted to a kind of religiousness Related Words: devoutnessreligiosityirreligiosityunreligiousnessritualityirreligiousnessreverentnessreverentialityspiritualityreverendnessnonreligiousnessreverentialness Back to today's word