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Janitor vs Undefined - What's the difference?

janitor | undefined |

As a noun janitor

is (chiefly|us) someone who looks after the maintenance and cleaning of a public building.

As an adjective undefined is

lacking a definition or value.

janitor

English

(wikipedia janitor)

Noun

  • (en noun) (female:'' janitress''' or '''janitrix (''rare ))
  • (chiefly, US) someone who looks after the maintenance and cleaning of a public building.
  • a doorman

    • Synonyms

    * maintenance person * (mostly British ) caretaker * cleaner * (British) concierge * custodian * (One who cleans and maintains a garden) groundskeeper * curator * porter

    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