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

  • n. The vertebrate spine or spinal column.
  • n. Something, such as the keel of a ship, that resembles a backbone.
  • n. A main support or major sustaining factor: the backbone of a thesis.
  • n. Geology A ridge forming the principal axis of a mountain.
  • n. Geology The principal mountain ridge, range, or system of a region.
  • n. Chemistry The main chain of atoms in a polymer.
  • n. Strength of character; determination: displayed grit and backbone in facing adversity.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The series of vertebrae, separated by disks, that encloses and protects the spinal cord, and runs down the middle of the back in vertebrate animals.
  • n. any fundamental support, structure, or infrastructure
  • n. courage, fortitude, or strength

from the GNU version of the Collaborative International Dictionary of English

  • n. The column of bones in the back which sustains and gives firmness to the frame; the spine; the vertebral or spinal column.
  • n. Anything like , or serving the purpose of, a backbone.
  • n. Firmness; moral principle; steadfastness.

from The Century Dictionary and Cyclopedia

  • n. The bone of the middle line of the back; the spine; the vertebral column; the vertebræ collectively.
  • n. Something resembling a backbone in appearance, position, or office: as, the Apennines are the backbone of Italy.
  • n. Figuratively, firmness; stability of purpose; decision of character; resolution; moral principle.

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

  • n. the part of a network that connects other networks together
  • n. the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
  • n. the part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved
  • n. fortitude and determination
  • n. a central cohesive source of support and stability


from Wiktionary, Creative Commons Attribution/Share-Alike License

From back + bone.



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