WordWeb Online

1. A large sea wave
   - surge

1. Rise up as if in waves
   "smoke billowed up into the sky";
   - wallow
    
2. Move with great difficulty
   "The soldiers billowed across the muddy riverbed"
    
3. Rise and move, as in waves or billows
   "The army billowed forward";
   - surge, heave
    
4. Become inflated
   "The sails billowed";
   - balloon, inflate

Derived forms: billowed, billows, billowing

Type of: blow up, expand, go, inflate, locomote, move, moving ridge, soar, soar up, soar upwards, surge, travel, wave, zoom

Encyclopedia: Billow, Andrew