/ Dictionary / Index M millstream: Meaning and Definition of Find definitions for: mill•stream Pronunciation: (mil'strēm"), [key] — n. the stream in a millrace. millrace. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. millstone Mill Valley Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language