Definition of mill run
1 : a test of the mineral contents of rock or ore by actual milling
2 : millrace
3 : the salable lumber output of a sawmill
4 : the common run of an article passing through a mill
5 : something or someone average, ordinary, or mediocre an unpredictable kind of man, very different from the mill run of us down here — Angus Mowat
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up mill run? Please tell us where you read or heard it (including the quote, if possible).