/ Dictionary / Index M MTS: Meaning and Definition of Find definitions for: MTS Pronunciation: [key] multichannel television sound: a system adopted in the U.S. for broadcasting two or more stereo or unrelated audio channels over a single television station. Mts. Pronunciation: [key] mountains. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mts (Thesaurus) Mt. Rev. MTV Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language