/ Dictionary / Index T ton-mile: Meaning and Definition of Find definitions for: ton-mile Pronunciation: (tun'mīl'), [key] — n. a unit of freight transportation measurement equivalent to a ton of freight transported one mile. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tonlet tonn. Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language