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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.
Hyponyms (each of the following is a kind of sentience): modality; sense modality; sensory system (a particular sense). sensibility; sensitiveness; sensitivity ((physiology) responsiveness to external stimuli; the faculty of sensation).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.