/ Dictionary / Index B builder: Meaning and Definition of Find definitions for: build•er Pronunciation: (bil'dur), [key] — n. a person who builds. a person who constructs buildings under contract or as a speculation. a substance, as an abrasive or filler, added to soaps or other cleaning agents to increase their effectiveness. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: builder (Thesaurus) build-down builder's knot Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language