dust1 S3 W3 [uncountable]
dry powder consisting of extremely small bits of dirt that is in buildings on furniture, floors etc if they are not kept clean:
All the furniture was covered in dust.
a thick layer of dust
There's not a speck of dust in the kitchen.
gather/collect dust (=become covered with dust)
Her old trophies were collecting dust on the shelves.
Dust particles floated in the sunlight.
A sudden breeze sent motes of dust (=small bits of dust) dancing in the air.
dry powder consisting of extremely small bits of earth or sand:
The wind was blowing dust and leaves up from the ground.
A car sped past in a cloud of dust.
powder consisting of extremely small bits of a particular substance
to allow or wait for a confused situation to become clear