/ Dictionary / Index B belowdecks: Meaning and Definition of Find definitions for: be•low•decks Pronunciation: (bi-lō'deks"), [key] — adv. Naut. within the hull of a vessel: Fire raged belowdecks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. below belowground Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language