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Thesaurus: thoughtless

Lacking thought; careless; inconsiderate; rash; as, a thoughtless person, or act.

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  1. adv. Lacking thought; careless; inconsiderate; rash; as, a thoughtless person, or act.
  2. adv. Giddy; gay; dissipated.
  3. adv. Deficient in reasoning power; stupid; dull.
  4. adj. showing lack of careful thought
  5. adj. without care or thought for others
  6. 1. Lacking thought; careless; inconsiderate; rash; as, a thoughtless person, or act. 2. Giddy; gay; dissipated. [R.] Johnson. 3. Deficient in reasoning power; stupid; dull. Thoughtless as monarch oaks that shade the plain. Dryden. -- Thought"less*ly, adv. -- Thought"less*ness, n.
  7. j:100 a. showing lack of careful thought s. without care or thought for others; `Let them eat cake'"