/ Dictionary / Index H half-breadth plan: Meaning and Definition of Find definitions for: half'-breadth' plan" Pronunciation: (haf'bredth', -bretth', -breth', häf'-), [key] — Naval Archit. Naval Archit. a diagrammatic plan of one half of the hull of a vessel divided lengthwise amidships, showing water lines, stations, diagonals, and bow and buttock lines. Cf. body plan, sheer plan. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. half-bound half-breed Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language