1. a quantity of paper, typically 500 sheets
2. a large quantity of something
Usage: informal

1. to enlarge a hole with a special tool
Usage: technical

Examples

• The printer needs a fresh ream of paper.
• She bought three reams of copy paper for the office.
• He wrote reams of notes during the lecture.
• The detective had reams of evidence to review.
• The machinist will ream the hole to the exact diameter.
• You need to ream out that opening to fit the bolt.