solemnity
so·lem·nity
noun
1.
a trait of dignified seriousness
Origin
From solemn + -ity, from Middle English solemnity (“observance of formality and ceremony”), frequently in the phrases in solemnity, with solemnity, which from Old French solemnite, from Latin sollemnitās, from sollemnis. (Compare solemn.)
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.