blocker

[ blok-er ]

noun
  1. a person or thing that blocks.

  2. Football. a player whose assignment or special skill is blocking.

  1. 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.

Origin of blocker

1
Middle English word dating back to 1200–50; see origin at block, -er1

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use blocker in a sentence

  • I'm not what us back-blockers call a parlour-man, though I may be a Dook; but neither the one nor the other is my fault.

    My Lord Duke | E. W. Hornung
  • She did not stop to consider how he came to be here; the back-blockers were already at explanations, but Olivia was not listening.

    My Lord Duke | E. W. Hornung

British Dictionary definitions for blocker

blocker

/ (ˈblɒkə) /


noun
  1. a person or thing that acts as a block

  2. 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