“howl” is a noun and verb with 7 meanings. Its most common meaning is: a long loud emotional utterance.
howl
noun
a long loud emotional utterance
“he gave a howl of pain”
“howls of laughter”
the long plaintive cry of a hound or a wolf
a loud sustained noise resembling the cry of a hound
“the howl of the wind made him restless”
verb
emit long loud cries
“wail in self-pity”
“howl with sorrow”
cry loudly, as of animals
“The coyotes were howling in the desert”
make a loud noise, as of wind, water, or vehicles
“The wind was howling in the trees”
“The water roared down the chute”
laugh unrestrainedly and heartily
Source: WordNet 3.1, Princeton University