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)