/ Dictionary / Index L lubber's knot: Meaning and Definition of Find definitions for: lub'ber's knot" Pronunciation: [key] — Naut. Naut. an improperly made reef or square knot, likely to slip loose. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lubber's hole lubber's line 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