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See more synonyms for blockade on Thesaurus.com
  1. the isolating, closing off, or surrounding of a place, as a port, harbor, or city, by hostile ships or troops to prevent entrance or exit.
  2. any obstruction of passage or progress: We had difficulty in getting through the blockade of bodyguards.
  3. Pathology. interruption or inhibition of a normal physiological signal, as a nerve impulse or a heart muscle–contraction impulse.
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verb (used with object), block·ad·ed, block·ad·ing.
  1. to subject to a blockade.
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Origin of blockade

1670–80; block (in the sense “to create obstacles”) + -ade1
Related formsblock·ad·er, nouncoun·ter·block·ade, noun, verb, coun·ter·block·ad·ed, coun·ter·block·ad·ing.non·block·ad·ed, adjectivepre·block·ade, noun, verb (used with object), pre·block·ad·ed, pre·block·ad·ing.pro·block·ade, adjectiveun·block·ad·ed, adjective

Synonym study

1. See siege.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Examples from the Web for blockaded

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British Dictionary definitions for blockaded


  1. military the interdiction of a nation's sea lines of communications, esp of an individual port by the use of sea power
  2. something that prevents access or progress
  3. med the inhibition of the effect of a hormone or a drug, a transport system, or the action of a nerve by a drug
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verb (tr)
  1. to impose a blockade on
  2. to obstruct the way to
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Derived Formsblockader, noun

Word Origin

C17: from block + -ade, as in ambuscade
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

Word Origin and History for blockaded



mid-17c., from block (v.) + -ade, false French ending (the French word is blocus, 18c. in this sense, which seems to be in part a back-formation from the verb bloquer and in part influenced by Middle Dutch blokhuus "blockhouse").

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late 17c., from blockade (n.). Related: Blockaded; blockading.

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Online Etymology Dictionary, © 2010 Douglas Harper

blockaded in Medicine


  1. Intravenous injection of large amounts of colloidal dyes in which the reaction of the reticuloendothelial cells to other influences is temporarily prevented.
  2. Arrest of nerve impulse transmission at autonomic synaptic junctions, autonomic receptor sites, or myoneural junctions through the action of a drug.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.