'Unconcernedness' definitions:

Definition of 'Unconcernedness'

From: GCIDE

Unconcerned \Un`con*cerned"\, a. Not concerned; not anxious or solicitous; easy in mind; carelessly secure; indifferent; as, to be unconcerned at what has happened; to be unconcerned about the future. -- {Un`con*cern"ed*ly}, adv. -- {Un`con*cern"ed*ness}, n. [1913 Webster]
Happy mortals, unconcerned for more. --Dryden. [1913 Webster]