sentinel

  1. Noun.  A sentry or guard.
  2. Noun.  (computer science) a unique string of characters recognised by a computer program for processing in a special way; a keyword. .
  3. Verb.  (transitive) To watch over as a guard.
  4. Verb.  (transitive) To post as guard.
  5. Verb.  (transitive) To post a guard for.

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This entry was last updated on RefTopia from its source on 3/20/2012.