1. (

• thump ,
• thumping ,
• clump ,
• clunk ,
• thud

) a heavy dull sound (as made by impact of heavy objects) ;

1. (

• thud ,
• thump

) make a dull sound; "the knocker thudded against the front door" ;

2. (

• thud

) strike with a dull sound; "Bullets were thudding against the wall" ;

3. (

• crump ,
• thud ,
• scrunch

) make a noise typical of an engine lacking lubricants ;