What is the meaning of mindless?

adjective

• Lacking the thinking capacity characteristic of a conscious being.
  • usage: "the shrieking of the mindless wind"
• Requiring little mental effort.
  • usage: "mindless tasks"
• Not mindful or attentive."while thus unmindful of his steps he stumbled- G. B. Shaw
  • synonyms: unmindful, forgetful
• Devoid of intelligence.
  • synonyms: asinine, fatuous, inane, vacuous
• Not marked by the use of reason.
  • usage: "mindless violence"; "reasonless hostility"; "a senseless act"
  • synonyms: reasonless, senseless