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Definition of: sentinel
(sen′tə·nəl) noun
A sentry; hence, any watcher or guard.
—v.t. ·neled or ·nelled, ·nel·ing or ·nel·ling
1. To watch over as a sentinel.
2. To protect or furnish with sentinels.
3. To station or appoint as a sentinel. [<OF sentinelle <Ital. sentinella <LL sentinare avoid danger <sentire perceive]
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