noun
a central cohesive source of support and stability
Synonyms
Examples
- faith is his anchor
- the keystone of campaign reform was the ban on soft money
- he is the linchpin of this firm
noun
fortitude and determination
Synonyms
Examples
- he didn't have the guts to try it
noun
the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
Synonyms
Examples
- the fall broke his back
noun
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
Synonyms
Examples
- the title and author were printed on the spine of the book
noun
the part of a network that connects other networks together
Examples
- the backbone is the part of a communication network that carries the heaviest traffic