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mm

1 American  
  1. millimeter; millimeters.


mM 2 American  
  1. millimole; millimoles.


mm. 3 American  

abbreviation

  1. thousands.


mm. 4 American  

abbreviation

  1. Music. measures.

  2. millimeter; millimeters.


MM. 5 American  

abbreviation

  1. Messieurs.


M.M. 6 American  

abbreviation

  1. Master Mason.

  2. Master Mechanic.

  3. Master of Music.


mm 1 British  

symbol

  1. millimetre

"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

abbreviation

  1. mutatis mutandis

"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
MM 2 British  

abbreviation

  1. Military Medal

  2. the French equivalent of Messrs

"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

mm 3 British  

abbreviation

  1. Myanmar

"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

mm Scientific  
  1. Abbreviation of millimeter


Etymology

Origin of mm.

From the Latin word millia

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.

The 600 mm rocket launchers, which have a purported range of around 260 miles, were cited as a top goal by Kim at a rare Workers’ Party meeting last month.

From The Wall Street Journal • Mar. 15, 2026

Using this approach, the researchers determined that global sea level rose by about 90 mm between 1993 and 2022.

From Science Daily • Feb. 24, 2026

"By January 29, the Moscow State University Meteorological Observatory had recorded almost 92 mm of precipitation, which is already the highest value in the last 203 years," it added.

From Barron's • Jan. 29, 2026

Parts of Scotland valid Tuesday from 06:00 until 23:59 for heavy rain and hill snow, rainfall amounts of 20 to 35 mm widely and more in some places.

From BBC • Jan. 26, 2026

Ellsberg went back to his cot and fell asleep, and it was not until the next morning that he noticed an unexploded .60 mm shell sticking into the floor a few feet from his bed.

From "Most Dangerous: Daniel Ellsberg and the Secret History of the Vietnam War" by Steve Sheinkin