Dictionary.com

blocker

[ blok-er ]
/ ˈblɒk ər /

noun

a person or thing that blocks.
Football. a player whose assignment or special skill is blocking.
Biochemistry. a substance that inhibits the physiological action of another substance, as the beta blocker propranolol that interferes with neurotransmitters in the sympathetic nervous system.

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Origin of blocker

Middle English word dating back to 1200–50; see origin at block, -er1

Words nearby blocker

block coal, block coefficient, block diagram, blocked, blocked shoe, blocker, block faulting, blockflöte, block front, block grant, blockhead
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for blocker

British Dictionary definitions for blocker

blocker
/ (ˈblɒkə) /

noun

a person or thing that acts as a block
physiol an agent that blocks a physiological function, such as the transport of an ion across an ion channel
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012