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1. Make a dull sound
   "the knocker thudded against the front door"
   - thump
    
2. Strike with a dull sound
   "Bullets were thudding against the wall"
    
3. Make a noise typical of an engine lacking lubricants
   - crump, scrunch

1. A heavy dull sound (as made by impact of heavy objects)
   - thump, thumping, clump, clunk, clonk

Derived forms: thudded, thuds, thudding

Type of: collide with, crackle, crunch, go, hit, impinge on, run into, scranch, scraunch, sound, strike

Encyclopedia: Thud