1. (used in the plural) a mechanical device that blows a strong current of air; used to make a fire burn more fiercely or to sound a musical instrument
   "The blacksmith pumped the bellows to intensify the forge fire"

1. A very loud utterance (like the sound of an animal)
   "his bellow filled the hallway";
   - bellowing, holla [archaic], holler [informal], hollering [informal], hollo [non-standard], holloa [rare], roar, roaring, yowl

1. Shout loudly and without restraint
   "The sergeant bellowed orders at the recruits";
   - bawl
    
2. Make a loud noise, as of an animal
   "The bull bellowed";
   - roar

Derived forms: bellowses

Type of: blower, call, cry, emit, let loose, let out, outcry, shout, utter, vociferation, yell

Encyclopedia: Bellows, Henry