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The definition of spine

7 Definitions of: spine

    1. noun, the spinal column
    2. noun, the sharply pointed tip or outgrowth of a leaf, stem, etc
    3. noun, zoology a hard pointed process or structure, such as the ray of a fin, the quill of a porcupine, or the ridge on a bone
    4. noun, the back of a book, record sleeve, etc
    5. noun, a ridge, esp of a hill
    6. noun, strength of endurance, will, etc
    7. noun, anything resembling the spinal column in function or importance; main support or feature
    8. Show me some examples of this word: spine
    9. Show me the etymology of the word: spine

From Collins