/ Dictionary / Index B blue flag: Meaning and Definition of Find definitions for: blue' flag" Pronunciation: [key] any North American plant of the genus Iris, esp. I. versicolor: the state flower of Tennessee. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bluefish blue flash Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language