Found 2 items, similar to thoughtlessness.
English → English (WordNet) Definition: thoughtlessness thoughtlessness n 1: the quality of failing to be considerate of others [syn: inconsideration, inconsiderateness] [ant: consideration, consideration] 2: the trait of not thinking carefully before acting [syn: unthoughtfulness] [ant: thoughtfulness]
English → English (gcide) Definition: Thoughtlessness Thoughtless \Thought"less\, adv. 1. Lacking thought; careless; inconsiderate; rash; as, a thoughtless person, or act. [1913 Webster] 2. Giddy; gay; dissipated. [R.] --Johnson. [1913 Webster] 3. Deficient in reasoning power; stupid; dull. [1913 Webster] Thoughtless as monarch oaks that shade the plain. --Dryden. [1913 Webster] -- Thought"less*ly, adv. -- Thought"less*ness, n. [1913 Webster]