intransitive. To make a roaring or rumbling noise; to purr, as a cat; to snarl or growl, as a dog. (Cf. wharl, v., whirr, v. 3a 3b.)

intransitive. To purr, as a cat.

intransitive. Of a cat or another feline animal: to make a low, continuous, vibratory sound taken to be expressive of satisfaction or pleasure.

intransitive. Of a cat: to purr. Also in later use, esp. of an engine: to make a sound resembling a cat's purr.

Of a cat: To purr. dialect.