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MST

1 American  
Or m.s.t.

  1. Mountain Standard Time.

M.S.T. 2 American  

abbreviation

  1. Master of Science in Teaching.

  2. Mountain Standard Time.

MST British  

abbreviation

  1. Mountain Standard Time

"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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

MST Financial analyst David Gibson told MarketWatch that the reopening of the Strait of Hormuz, when it happens, will ease supply-chain risks for the industry.

From MarketWatch • Apr. 8, 2026

The event will take place in room West 105 of the Phoenix Convention Center from 10:00 AM - 11:00 AM MST Saturday, February 14th, 2026.

From Science Daily • Feb. 14, 2026

MST, the Colorado State Patrol Golden Troop posted on social media, with all westbound lanes being closed within five minutes.

From Washington Times • Dec. 8, 2023

For MST survivors, access to lifesaving mental health care is often lacking.

From Slate • Oct. 26, 2023

My MST classmates are so indolent, they wouldn’t read the book for homework, so the teacher is making us read it aloud to shame us.

From "Please Ignore Vera Dietz" by A.S. King

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.