Meanings
- The time zone that encompasses most areas around the Rocky Mountains in the United States (except most of Arizona outside the Navajo Nation), Alberta, the cross-border city of Lloydminster and its surrounding rural municipalities in Saskatchewan, the Northwest Territories, southeastern British Columbia and the western third of Nunavut in Canada from the first Sunday of November to the second Sunday of March, and the states of Baja California Sur, Chihuahua (majority), Nayarit, Sinaloa and Sonora in Mexico year round; it is seven hours behind Coordinated Universal Time (UTC-7).
Synonyms: MST
Synonyms & antonyms
proper nounThe time zone that encompasses most areas around the Rocky Mountains in the United States (except most of Arizona outside the Navajo Nation), Alberta, the cross-border city of Lloydminster and its surrounding rural municipalities in Saskatchewan, the Northwest Territories, southeastern British Columbia and the western third of Nunavut in Canada from the first Sunday of November to the second Sunday of March, and the states of Baja California Sur, Chihuahua (majority), Nayarit, Sinaloa and Sonora in Mexico year round; it is seven hours behind Coordinated Universal Time (UTC-7).
More synonyms by meaning
nounstandard time in the 7th time zone west of Greenwich, reckoned at the 105th meridian west; used in the mountain states of the United States
Synonym sets from Open English WordNet, CC BY 4.0.
Translations
French heure normale des Rocheuses
- heure normale des Rocheusestime zone
Spanish tiempo de las montañas
- tiempo de las montañastime zone
Cite this entry
Mountain Standard Time. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Mountain%20Standard%20Time
“Mountain Standard Time.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Mountain%20Standard%20Time. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “Mountain Standard Time,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Mountain%20Standard%20Time.
Source: Mountain Standard Time on Wiktionary, CC BY-SA 4.0.