/ Dictionary / Index M methylated spirits: Meaning and Definition of Find definitions for: meth'ylated spir'its Pronunciation: [key] ethyl alcohol denatured with methyl alcohol for the purpose of preventing its use as an alcoholic beverage. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. methylate methylation Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language