Definition of "Ream" :

noun: a quantity of paper; 480 or 500 sheets; one ream equals 20 quires

noun: a large quantity of written matter

"He wrote reams and reams."

verb: enlarge with a reamer

"Ream a hole."

verb: remove by making a hole or by boring

"The dentist reamed out the debris in the course of the root canal treatment."

verb: squeeze the juice out (of a fruit) with a reamer

"Ream oranges."