/ Dictionary / Index S Stillson wrench: Meaning and Definition of Find definitions for: Still'son wrench" Pronunciation: (stil'sun), [key] — Trademark. Trademark. a monkey wrench with a pivoted, adjustable jaw that grips pipes, bars, etc., more tightly when pressure is exerted on the handle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. stillroom still trailer Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language