What's the difference between
and
Enter two words to compare and contrast their definitions, origins, and synonyms to better understand how those words are related.

Sentinel vs Undefined - What's the difference?

sentinel | undefined |

As a noun sentinel

is a sentry or guard.

As a verb sentinel

is to watch over as a guard.

As an adjective undefined is

lacking a definition or value.

sentinel

English

Noun

(en noun)
  • A sentry or guard.
  • * 1719-
    • They promised faithfully to bear their confinement with patience, and were very thankful that they had such good usage as to have provisions and light left them; for Friday gave them candles (such as we made ourselves) for their comfort; and they did not know but that he stood sentinel over them at the entrance.
  • * Macaulay
    • the sentinels who paced the ramparts
  • (computer science) a unique string of characters recognised by a computer program for processing in a special way; a keyword.
    • The ''<nowiki>'' tag is a sentinel that suspends web-page processing and displays the subsequent text literally.
  • Watch; guard.
  • * Francis Bacon
    • that princes do keep due sentinel
  • A sentinel crab.

    • Verb

  • To watch over as a guard.
    • He sentineled the north wall.
  • To post as guard.
    • He sentineled him on the north wall.
  • To post a guard for.
    • He sentineled the north wall with just one man.

    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