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sentry (plural sentries) 1  A guard, particularly on duty at the entrance to a military base. ( 2 uncountable) Sentry duty; time spent being a sentry. ( 3 nautical) A form of drag to be towed underwater, which on striking bottom is upset and rises to the surface.
The noun SENTIENCE has 3 senses: 1. state of elementary or undifferentiated consciousness. 2. the faculty through which the external world is apprehended. 3. the readiness to perceive sensations; elementary or undifferentiated consciousness.Familiarity information: SENTIENCE used as a noun is uncommon.he readiness to perceive sensations; elementary or undifferentiated consciousness. Classified under: Nouns denoting attributes of people and objects. Context example: gave sentience to slugs and newts.