/ Dictionary / Index D dimension lumber: Meaning and Definition of Find definitions for: dimen'sion lum"ber Pronunciation: [key] building lumber cut to standard or specified sizes. sawed lumber from 2 to 5 in. (5 to 12.7 cm) thick and from 4 to 12 in. (10.2 to 30.5 cm) wide. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dimensional analysis dimension stone Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language