Gain access to thousands of additional definitions and advanced search features—ad free! JOIN NOW
: Mountain Time observed during that part of the year when Daylight Saving Time is in effect
You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
Share Mountain Daylight Time
Resources for Mountain Daylight Time
Mountain Daylight Time
Comments on Mountain Daylight Time
What made you want to look up Mountain Daylight Time? Please tell us where you read or heard it (including the quote, if possible).
an open space surrounded by woods
Get Word of the Day daily email!
Name that Food Quiz
Test your vocabulary with our 10-question quiz!
Test Your Knowledge - and learn some interesting things along the way.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Words from the week of 9/14/2018
For frog-tossing, sword dancing, & more
That dessert might kill you
How a folk song became a term of derision.
And is one way more correct than the others?
The story of an imaginary word that managed to sneak past our editors and enter the dictionary.
How to use a word that (literally) drives some people nuts.
The awkward case of 'his or her'
Test your knowledge of food and food words.
A quiz in common time.
Build a city of skyscrapers—one synonym at a time.