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Backbone vs Undefined - What's the difference?

backbone | undefined |

As a noun backbone

is 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.

As an adjective undefined is

lacking a definition or value.

backbone

English

Noun

(en noun)
  • 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.
  • any fundamental support, structure, or infrastructure
    • Before automobiles, railroads were a backbone of commerce.
  • courage, fortitude, or strength
    • He would make a good manager, if he had a little more backbone .

    Synonyms

    * spine * spinal column * vertebral column * See also

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
    • The result of division by zero is undefined .

    Antonyms

    * defined