Small, heavy objects used to make things go down in water.
Sinkers are important for fishing and for keeping things underwater.
Examples:
He uses sinkers to make his fishing line go down.
I need some sinkers to hold the paper down in the water.
The sinkers help the fishing line go down in the water.
The sinkers are so heavy, they make the fishing line go down fast.
I have a lot of sinkers to make sure the paper stays down.
The sinkers are like little rocks that help the fishing line go down.