1. A measurement of a quantity of paper, typically 500 individual sheets of paper to a package: Lorna bought a ream of green cards on which to print the announcements.
2. A very large amount: There was one ream after another ream of material to read before going to the meeting.

1. To enlarge or to widen a hole using a specifically designed tool: The plumber had to ream the drain pipe so the water could drain properly.
2. To squeeze the juice out of fruit: Susanna will use the gadget with a ridge and conical top to ream the oranges so she can have a fresh orange smoothie for breakfast!