Definition of Mountain time in English:

Mountain time

Syllabification: Moun·tain time
  • The standard time in a zone including parts of the US and Canada in or near the Rocky Mountains, specifically.
    • (Mountain Standard Time abbrev.: MST) standard time based on the mean solar time at the meridian 105° W., seven hours behind GMT. (Mountain Daylight Time abbrev.: MDT) Mountain time during daylight saving time, six hours behind GMT.
    More example sentences
    • Heading north on Mexico's Highway 200, I soon crossed from the Central into the Mountain time zone.
    • The same line separates the Pacific and Mountain time zones - and Arizona doesn't observe Daylight Saving Time.
    • This is similar to much of Texas, which should (by longitude) be mostly in the Mountain time zone instead of the Central time zone.

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Word of the day coloratura
Pronunciation: ˌkɒlərəˈtjʊərə
noun
elaborate ornamentation of a vocal melody