/ Dictionary / Index S sentry box: Meaning and Definition of Find definitions for: sen'try box" Pronunciation: [key] a small structure for sheltering a sentry from bad weather. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sentry sentry palm Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language