What is the meaning of ream?

noun

• A large quantity of written matter.
  • usage: "he wrote reams and reams"
• A quantity of paper; 480 or 500 sheets; one ream equals 20 quires.

verb

• Squeeze the juice out (of a fruit) with a reamer.
  • usage: "ream oranges"
• Remove by making a hole or by boring.
  • usage: "the dentist reamed out the debris in the course of the root canal treatment"
• Enlarge with a reamer.
  • usage: "ream a hole"