WordReference Random House Unabridged Dictionary of American English © 2020
re•tor•sion  (ri tôrshən),USA pronunciation n. [Internat. Law.]
  1. Lawretaliation or reprisal by one state identical or similar to an act by an offending state, such as high tariffs or discriminating duties.
Also,  retortion. 
  • Medieval Latin retorsiōn- (stem of retorsiō, variant of retortiō); see retortion
  • 1650–60

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