/ Dictionary / Index O oast: Meaning and Definition of Find definitions for: oast Pronunciation: (ōst), [key] a kiln for drying hops or malt. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oast (Thesaurus) oasis oast-house Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language