Home › Words › U › unconcernmentunconcernmentunconcernment · noun — lack of concern; unconcern.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom un- + concern + -ment.nounLack of concern; unconcern.e.g.“It is he alone who can look Death and Danger in the Face with a rational Unconcernment” — 1692–1717, Robert South, Twelve Sermons Preached upon Several Occasions, volume (please specify |volume=I to VI), London:Definitions & examples from Wiktionary (CC BY-SA 3.0).