Home › Words › U › unseriousnessunseriousnessunseriousness means the state or quality of being unserious.EtymologyFrom unserious + -ness.nounThe state or quality of being unserious.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.nonseriousness 86% match — The quality of not being serious. vs unseriousness →unserious 83% match — Not serious.; Characterized by a lack of seriousness (e.g., earnestness, commitment). vs unseriousness →unhumorousness 68% match — The quality of not being humorous. vs unseriousness →nonserious 68% match — Not serious. vs unseriousness →seriosity 67% match — Synonym of seriousness. vs unseriousness →unserenity 66% match — The quality of not being serene. vs unseriousness →jocoseriosity 65% match — The quality of being jocoserious. vs unseriousness →unceremoniousness 65% match — The quality of being unceremonious. vs unseriousness →