/ Dictionary / Index L lower deck: Meaning and Definition of Find definitions for: low'er deck' Pronunciation: (lō'ur), [key] — Naut. Naut. the lowermost deck in a hull having two or three decks. the deck next above the lowermost, or orlop, deck in a hull having four or more decks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lower criticism Lower Depths, The* Related Content Daily Word Quiz: bibliophile Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language