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

  • adj. Lacking courage or willpower.
  • adj. Biology Having no spiny processes.
  • adj. Biology Lacking a spinal column; invertebrate.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Having no spine
  • adj. uncourageous

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having no spine, or vertebral column.
  • adj. Having no thorns or barbs.
  • adj. lacking in strength of character; cowardly, in a physical or moral sense.

from The Century Dictionary and Cyclopedia

  • Having no spine or spinal column; invertebrate.
  • Having no backbone, vigor, or courage; limp; weak; nerveless.
  • Having the backbone flexible or supple.
  • In ichthyology, having no fin-spines; soft-finned; anacanthine; malacopterous: as, the spineless fishes, or Anacanthini.

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

  • adj. lacking a backbone or spinal column
  • adj. lacking thorns
  • adj. lacking spiny processes
  • adj. weak in willpower, courage or vitality


from Wiktionary, Creative Commons Attribution/Share-Alike License

spine +‎ -less



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