v. Of a cat, to make a vibrating sound in its throat when contented.v. To say (something) in a throaty, seductive manner.v. To make a vibrating throaty sound, as from pleasure.v. To make a low and consistent rumbling sound.n. The vibrating sound made by a cat in its throat when contented.n. A throaty, seductive sound of pleasure made by a person.n. The low consistent rumble made by an engine at slow speed