/ Dictionary / Index O oilstone: Meaning and Definition of Find definitions for: oil•stone Pronunciation: (oil'stōn"), [key] — n. a block of fine-grained stone, usually oiled, for putting the final edge on certain cutting tools by abrasion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oilstone (Thesaurus) oilspot glaze oil tanker Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language