/ Dictionary / Index L lubber's line: Meaning and Definition of Find definitions for: lub'ber's line" Pronunciation: [key] — Navig. Navig. a vertical line on the forward inner side of the bowl of a fixed compass, used as a reference mark indicating the heading of a vessel. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lubber's knot Lubbock 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