/ Dictionary / Index R run-of-the-mill: Meaning and Definition of Find definitions for: run-of-the-mill Pronunciation: (run'uv-u-mil'), [key] — adj. merely average; commonplace; mediocre: just a plain, run-of-the-mill house; a run-of-the-mill performance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: run-of-the-mill (Thesaurus) run-of-paper run-of-the-mine 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