/ Dictionary / Index A acorn: Meaning and Definition of Find definitions for: a•corn Pronunciation: (ā'kôrn, ā'kurn), [key] — n. the typically ovoid fruit or nut of an oak, enclosed at the base by a cupule. a finial or knop, as on a piece of furniture, in the form of an acorn. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: acorn (Thesaurus) aconite acorn barnacle Related Content Daily Word Quiz: laudable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language