Moun·tain Standard Time (moun t n)n. Abbr. MST Standard time in the seventh time zone west of Greenwich, England, reckoned at 105° west and used in the Rocky Mountain states of the United States. Also called Mountain Time. |
Mountain Standard Time
n
(Earth Sciences / Physical Geography) one of the standard times used in North America, seven hours behind Greenwich Mean Time Abbreviation MST
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| Noun | 1. | Mountain Standard Time - standard time in the 7th time zone west of Greenwich, reckoned at the 105th meridian west; used in the mountain states of the United States civil time, local time, standard time - the official time in a local region (adjusted for location around the Earth); established by law or custom |
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