n. The series of vertebrae, separated by disks, that encloses and protects the spinal cord, and runs down the middle of the back in vertebrate animals.
n. any fundamental support, structure, or infrastructure
n. courage, fortitude, or strength
the GNU version of the Collaborative International Dictionary of English
n. The column of bones in the back which sustains and gives firmness to the frame; the spine; the vertebral or spinal column.
n. Anything like , or serving the purpose of, a backbone.
n. Firmness; moral principle; steadfastness.
The Century Dictionary and Cyclopedia
n. The bone of the middle line of the back; the spine; the vertebral column; the vertebræ collectively.
n. Something resembling a backbone in appearance, position, or office: as, the Apennines are the backbone of Italy.
n. Figuratively, firmness; stability of purpose; decision of character; resolution; moral principle.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the part of a network that connects other networks together
n. the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
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
n. fortitude and determination
n. a central cohesive source of support and stability
Word Usage
"The yellow streak up his backbone is the width of the M25."