intransitive. Of a large (typically wild) animal (esp. a lion): to utter a loud deep cry. Also with out.

intransitive. To bellow, roar, make a loud noise.

intransitive. Of an animal: to utter a loud cry or noise, esp. as an expression of fear, pain, or distress.

intransitive. Of an animal (esp. a lion): to roar. Also: to lament, cry out, rage as though mad.

intransitive. To roar.

Applied to the roaring of other animals; used formerly in sense of bell, v.4 2.

Said of animals making loud cries. Obsolete.

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. Scottish. Of an animal (or monster): to bellow in the manner of a bull; to roar. Now rare.

intransitive. To roar, rage, growl: spec. of a boar.

Adaptation of Dutch brullen to roar.