/ Dictionary / Index B black rat: Meaning and Definition of Find definitions for: black' rat' Pronunciation: [key] an Old World rat, Rattus rattus, now common in the southern U.S., having a black or brown body with grayish or white underparts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. black raspberry Black Renaissance Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language