Definitions of ream:

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

  Example: "He wrote reams and reams"

• verb:   enlarge with a reamer

  Example: "Ream a hole"

• verb:   remove by making a hole with a reamer

  Example: "Ream paper"

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

  Example: "Ream oranges"

• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #8254)