intransitive verb

1. to utter the long, loud, wailing cry of wolves, dogs, etc.
2. to utter a similar cry of pain, anger, grief, etc.
3. to make a sound like this the wind howls
4. to shout or laugh in scorn, mirth, etc.

Etymology: ME hulen, akin to Ger heulen < IE echoic base *kāu- > Sans kāuti, (it) cries, OHG hūwila, owl

transitive verb

1. to utter with a howl or howls
2. to drive or effect by howling

noun

1. a long, loud, wailing cry of a wolf, dog, etc.
2. any similar sound
3. Informal something hilarious; joke