/ Dictionary / Index W Woodruff key: Meaning and Definition of Find definitions for: Wood'ruff key" Pronunciation: [key] — Mach. Mach. a key having the form of a nearly semicircular disk fitting into a recess in a shaft. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. woodruff Woods 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