/ Dictionary / Index W Willow Run: Meaning and Definition of Find definitions for: Wil'low Run' Pronunciation: [key] a suburban area W of Detroit, Michigan, near Ypsilanti: airport. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. willow ptarmigan willowwacks Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language