roar roar /ˈrɔr/

noun

1. () A deep prolonged loud noise  ( boom , roaring , thunder , roar )
   a deep prolonged loud noise
     The lion's powerful roar echoed through the savannah.
   The lion's powerful roar echoed through the savannah.
   
2. () A very loud utterance (like the sound of an animal)  ( bellowing , holla [Archaic] , hollo [Non-standard] , bellow , holler [Informal] , holloa , roar , roaring , yowl , hollering [Informal] )
   a very loud utterance (like the sound of an animal)
    His bellow filled the hallway
   his bellow filled the hallway
   
3. The sound made by a lion  ( roar )
   the sound made by a lion
   

verb

1. () Make a loud noise, as of wind, water, or vehicles  ( howl , roar )
   make a loud noise, as of wind, water, or vehicles
    The wind was howling in the trees
   The wind was howling in the trees
    The water roared down the chute
   The water roared down the chute
   
2. () Utter words loudly and forcefully  ( thunder , roar )
   utter words loudly and forcefully
    Get out of here,' he roared
   Get out of here,' he roared
   
3. () Emit long loud cries  ( ululate , yaup , yawl , howl , roar , wail )
   emit long loud cries
    Wail in self-pity
   wail in self-pity
    Howl with sorrow
   howl with sorrow
   
4. () Make a loud noise, as of animal  ( bellow , roar )
   make a loud noise, as of animal
    The bull bellowed
   The bull bellowed
   
5. () Act or proceed in a riotous, turbulent, or disorderly way  ( roar )
   act or proceed in a riotous, turbulent, or disorderly way
    Desperadoes from the hills regularly roared in to take over the town
   desperadoes from the hills regularly roared in to take over the town
   
6. Laugh unrestrainedly and heartily  ( howl , roar )
   laugh unrestrainedly and heartily