Meaning : A large quantity of written matter.
Example :
He wrote reams and reams.
Meaning : A quantity of paper. 480 or 500 sheets. One ream equals 20 quires.
Meaning : Squeeze the juice out (of a fruit) with a reamer.
Example :
Ream oranges.
Meaning : Remove by making a hole or by boring.
Example :
The dentist reamed out the debris in the course of the root canal treatment.
Meaning : Enlarge with a reamer.
Example :
Ream a hole.