What is the meaning of roar?

noun

• A deep prolonged loud noise.
  • synonyms: boom, roaring, thunder
• A very loud utterance (like the sound of an animal. )
  • usage: "his bellow filled the hallway"
  • synonyms: bellow, bellowing, holla, holler, hollering, hollo, holloa, roaring, yowl
• The sound made by a lion.

verb

• 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: howl
• Utter words loudly and forcefully.
  • usage: "`Get out of here,' he roared"
  • synonyms: thunder
• Emit long loud cries.
  • usage: "wail in self-pity"; "howl with sorrow"
  • synonyms: howl, ululate, wail, yawl, yaup
• Act or proceed in a riotous, turbulent, or disorderly way. "desperadoes from the hills regularly roared in to take over the town-R. A. Billington
• Make a loud noise, as of animal.
  • usage: "The bull bellowed"
  • synonyms: bellow
• Laugh unrestrainedly and heartily.
  • synonyms: howl