- rattail⇄adj. having a tail or taillike part like that of a rat; long and slender.
Ex. Everything in the house, down to the last rattail hinge and hickory floor-peg, is historically accurate (Atlantic). - rattail⇄noun 1. something resembling a rat's tail.
2. a horse's tail with little or no hair.
3. a deep-sea fish with a long, tapering tail; grenadier. - rattail⇄rattail, adjective, noun.