Adjective

(en adjective)

(lb) Free from care; unworried, without anxiety.

*:

*:Good-humored, easy, and careless , he presided over his whale-boat as if the most deadly encounter were but a dinner, and his crew all invited guests.

Not concerned or worried (about).

*

*:"He was here," observed Drina composedly, "and father was angry with him." ¶ "What?" exclaimed Eileen. "When?" ¶ "This morning, before father went downtown." ¶ Both Selwyn and Lansing cut in coolly, dismissing the matter with a careless word or two; and coffee was served—cambric tea in Drina's case.

Not giving sufficient attention or thought, especially concerning the avoidance of harm or mistakes.

:

Adjective

(en adjective)

Showing a lack of forethought or sense.

Having no sensible meaning or purpose.

An act of mindless violence.

* {{quote-news

, year=2012 , date=August 5 , author=Nathan Rabin , title=TV: Review: THE SIMPSONS (CLASSIC): “I Love Lisa” (season 4, episode 15; originally aired 02/11/1993) citation , page= , passage=“I Love Lisa” opens with one of my favorite underappreciated running jokes from The Simpsons : the passive-aggressive, quietly contentious relationship of radio jocks Bill and Marty, whose mindless happy talk regularly gives way to charged exchanges that betray the simmering resentment and disappointment perpetually lingering just under the surface of their relationship.}}

Heedless.

(of a thing done) Overly repetitive and unchallenging.

Lacking a mind.

Atheism alleges that mindless scientific forces control the universe.