01 n. Mountain Standard Time, the time of the 105th meridian, used in the mountain states of the U.S.
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1.
Mountain Standard Time, the time of the 105th meridian, used in the mountain states of the U.S.[abbr.]
Entry
1 sense
Webster, 1913
MST
· IPA /ˌɛm ˌɛs ˈtiː/