compression Hear it!

compression definition

com·pres·sion (kəm pres̸h′ən)

noun

  1. a compressing or being compressed
  2. Mech. the compressing of the air-fuel mixture in an internal-combustion engine just before ignition

Etymology: ME < OFr < L compressio

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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