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worst-case

[wurst-keys] /ˈwɜrstˌkeɪs/
adjective
1.
of the worst possibility; being the worst result that could be expected under the circumstances:
a worst-case scenario.
Compare best-case.
Origin of worst-case
1960-1965
First recorded in 1960-65
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for worst case

worst case

noun
1.
  1. a situation in which the most unfavourable conditions prevail
  2. (as modifier): a worst-case projection of a massive accident
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
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