/ Dictionary / Index R rust belt: Meaning and Definition of Find definitions for: rust' belt" Pronunciation: [key] — (sometimes caps.) the heavily industrial area of the northeastern U.S. containing the older industries and factories. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rustbelt (Thesaurus) Rustavi rustbucket Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language