1. the series of bones down the center of the back that supports the body
2. the back edge of a book where the pages are bound together
3. a sharp pointed part on a plant or animal

Examples

• She injured her spine in the accident.
• The book’s title was printed on the spine.
• The cactus has sharp spines that protect it from animals.
• A porcupine’s spines stand up when it feels threatened.
• He showed real spine when he stood up to the bullies.
• The spine of the mountain ridge was visible from miles away.
• Physical therapy helped strengthen her spine after surgery.