/ Dictionary / Index M methylbenzene: Meaning and Definition of Find definitions for: meth•yl•ben•zene Pronunciation: (meth"ul-ben'zēn, -ben-zēn'), [key] — n. Chem. toluene. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: methylbenzene (Thesaurus) methylation methylbenzyl acetate 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