ream¹ / rēm/ • n. 500 (formerly 480) sheets of paper. ∎  a large quantity of something, typically paper or writing on paper: reams of paper have been used to debate these questions.ream² • v. [tr.] widen (a bore or hole) with a special tool. ∎  widen a bore or hole in (a gun or other metal object) in such a way. ∎  clear out or remove (material) from something. ∎ vulgar slang have anal intercourse with (someone). ∎  inf. rebuke someone fiercely: the agent was reaming him out for walking away from the deal.PHRASES: ream someone's ass (or butt) vulgar slang criticize or rebuke someone.

Ream

a bale or bundle of clothes or paper; specifically, today, 500 sheets; a large amount of paper, 1392.

Examples : ream of ballads, 1630; of bloom, 1699; of modern plays, 1814; of nonsense; of rhyme, 1839; of writing paper, 1689.

ream 20 quires of paper. XIV. — OF. raime, reyme, remme (mod. rame), also riesme — Arab. rizma bundle, f. razama collect into a bundle.