Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Lacking sense or meaning; meaningless.
  • adj. Deficient in sense; foolish or stupid.
  • adj. Insensate; unconscious.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Bereft of feeling or consciousness; deprived of sensation; unconscious; insensible.
  • adj. Lacking meaning or purpose; without common sense; pointless; meaningless.
  • adj. Without consideration, awareness or sound judgement; unreasonable; unwise; stupid.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Destitute of, deficient in, or contrary to, sense; without sensibility or feeling; unconscious; stupid; foolish; unwise; unreasonable.

from The Century Dictionary and Cyclopedia

  • Destitute of sense; having no power of sensation or perception; incapable of sensation or feeling; insensible.
  • Inappreciative; lacking in appreciation; without perception.
  • Lacking understanding; acting without sense or judgment; foolish; stupid.
  • Without meaning, or contrary to reason or sound judgment; ill-judged; unwise; foolish; nonsensical.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. not marked by the use of reason
  • adj. serving no useful purpose; having no excuse for being
  • adj. (of especially persons) lacking sense or understanding or judgment
  • adj. unresponsive to stimulation

Etymologies

sense +‎ -less (Wiktionary)

Examples

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