/ Dictionary / Index H house mouse: Meaning and Definition of Find definitions for: house' mouse" Pronunciation: [key] a brownish-gray Old World mouse, Mus musculus, now common in the U.S. in or near houses. See illus. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. housemother house music Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language