To thud is to make the loud sound of something heavy hitting or falling. Tip your chair too far back and your body may thud against the floor.

Throw an egg off a balcony onto the pavement below, and it will splat, but throw a heavy dumbbell off the same balcony and it will thud — you can call the sound it makes a thud as well. The verb originally meant "to strike, stab, or thrust," from the Old English imitative word þyddan, and the noun was used to mean "blast of wind" in the early sixteenth century.

Definitions of thud

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

clump, clunk, thump, thumping
Type of:
the sudden occurrence of an audible event

v make a dull sound

“the knocker thudded against the front door”
Type of:
go, sound
make a certain noise or sound

v strike with a dull sound

“Bullets were thudding against the wall”
Type of:
collide with, hit, impinge on, run into, strike
hit against; come into sudden contact with

v make a noise typical of an engine lacking lubricants

crump, scrunch
Type of:
crackle, crunch, scranch, scraunch
make a crushing noise

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