/ Dictionary / Index T three-mile limit: Meaning and Definition of Find definitions for: three'-mile lim'it Pronunciation: (thrē'mīl"), [key] — Internat. Law. Internat. Law. the limit of the marine belt of three mi. (4.8 km), which is included within the jurisdiction of the state possessing the coast. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Three Mile Island Three Musketeers, The* Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language