/ Dictionary / Index R run-of-the-mine: Meaning and Definition of Find definitions for: run-of-the-mine Pronunciation: (run'uv-u-mīn'), [key] — adj. of or pertaining to ore or coal that is crude, ungraded, etc. common or ordinary; run-of-the-mill: a boring, run-of-the-mine performance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: run-of-the-mine (Thesaurus) run-of-the-mill run-on Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language