Definition of "Howl" :
noun: a long loud emotional utterance
"He gave a howl of pain."
noun: a loud sustained noise resembling the cry of a hound
"The howl of the wind made him restless."
noun: the long plaintive cry of a hound or a wolf
verb: laugh unrestrainedly and heartily
verb: make a loud noise, as of wind, water, or vehicles
"The wind was howling in the trees."
verb: emit long loud cries
"Howl with sorrow."
verb: cry loudly, as of animals
"The coyotes were howling in the desert."