- an Old World rat, Rattus rattus, now common in the southern U.S., having a black or brown body with grayish or white underparts.
Origin of black rat
First recorded in 1765–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for black rat
Not so, however, with the black-rat blister-beetle, which is on hand ready for business early in the season.The $100 Prize Essay on the Cultivation of the Potato; and How to Cook the Potato
D. H. Compton and Pierre Blot
- a common rat, Rattus rattus : a household pest that has spread from its native Asia to all countries