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Mountain time

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noun
  1. See under standard time.
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Origin of Mountain time

1880–85; Americanism
Also called Mountain Standard Time.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for mountain standard time

Mountain Standard Time

noun
  1. one of the standard times used in North America, seven hours behind Greenwich Mean TimeAbbreviation: MST
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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