What is the meaning of howl?

noun

• A long loud emotional utterance.
  • usage: "he gave a howl of pain"; "howls of laughter"; "their howling had no effect"
  • synonyms: howling, ululation
• The long plaintive cry of a hound or a wolf.
• A loud sustained noise resembling the cry of a hound.
  • usage: "the howl of the wind made him restless"

verb

• Emit long loud cries.
  • usage: "wail in self-pity"; "howl with sorrow"
  • synonyms: ululate, wail, roar, yawl, yaup
• Cry loudly, as of animals.
  • usage: "The coyotes were howling in the desert"
  • synonyms: wrawl, yammer, yowl
• Make a loud noise, as of wind, water, or vehicles.
  • usage: "The wind was howling in the trees"; "The water roared down the chute"
  • synonyms: roar
• Laugh unrestrainedly and heartily.
  • synonyms: roar