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Lookup vs Undefined - What's the difference?

lookup | undefined |

As a noun lookup

is an attempt to retrieve data.

As an adjective undefined is

lacking a definition or value.

lookup

English

Noun

(lookups)
  • An attempt to retrieve data.
    • My database lookup failed because I misspelled the word.

    Related terms

    * look up

    Anagrams

    *

    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