Definitions of spine:

  • noun:   a sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin
  • noun:   a sharp-pointed tip on a stem or leaf
  • noun:   any pointed projection
  • noun:   the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
  • name:  A surname (very rare: popularity rank in the U.S.: #67628)