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Spacer vs Undefined - What's the difference?

spacer | undefined |

As a noun spacer

is a person who works in space.

As an adjective undefined is

lacking a definition or value.

spacer

English

Noun

(en noun)
  • A person who works in space.
  • An object inserted to hold a space open in a row of items, e.g. beads or printed type.
  • A bushing.
  • (slang) A forgetful person.
  • (medicine) A type of add-on device used by an asthmatic person to increase the effectiveness of a metered-dose inhaler.

    • 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