/ Dictionary / Index B barn: Meaning and Definition of Find definitions for: barn Pronunciation: (bärn), [key] — n. a building for storing hay, grain, etc., and often for housing livestock. a very large garage for buses, trucks, etc.; carbarn. —v.t. to store (hay, grain, etc.) in a barn. barn Pronunciation: (bärn), [key] — n. Physics. a unit of nuclear cross section, equal to 10 square centimeter. Abbr.: b Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: barn (Thesaurus) barmy Barnabas Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language