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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.
sentience. n. 1. the state or quality of being sentient; awareness.2. sense perception not involving intelligence or mental perception; feeling.(ËsÉn ÊÉns). n.. 1. the state or quality of being sentient; awareness. 2. sense perception not involving intelligence or mental perception; feeling. (ËsÉn ÊÉns).