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Sentry vs Undefined - What's the difference?

sentry | undefined |

As a noun sentry

is a guard, particularly on duty at the entrance to a military base.

As an adjective undefined is

lacking a definition or value.

sentry

English

Noun

(sentries)
  • A guard, particularly on duty at the entrance to a military base.
  • (uncountable) Sentry duty; time spent being a sentry.

    • See also

    * sentinel

    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