blocker Hear it!

blocker definition

blocker (bläk′ər)

noun

someone or something that blocks; specif.,
  1. a drug or other substance that prevents certain biochemical reactions calcium blocker
  2. an offensive football player who tries to prevent the defensive players from reaching the ball carrier

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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