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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.
At Sentry, we truly are more than insuranceâwe come together to create a vibrant community through history, community, charity and development. Youâll find more than a job at Sentry. Youâll experience a rewarding career that expands well beyond a job title. Learn more about who we are and what we do.