One entry found for backbone.

Main Entry: back·bone
Pronunciation: -bn, -bn
Function: noun
1 : the skeleton of the trunk and tail of a vertebrate that consists of a jointed series of vertebrae enclosing and protecting the spinal cord -- called also spinal column
2 : the foundation or sturdiest part of something
3 : firmness of character <a coward with no backbone>
- back·boned /-bnd, -bnd/ adjective

Pronunciation Symbols