backbone (n.)a central cohesive source of support and stability;
backbone (n.)fortitude and determination;
backbone (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;
backbone (n.)the part of a network that connects other networks together;
the backbone is the part of a communication network that carries the heaviest traffic
backbone (n.)the series of vertebrae forming the axis of the skeleton and protecting the spinal cord;
Synonyms: spinal column /
vertebral column /
spine /
back /
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