mm

¹ American  

1. millimeter; millimeters.

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mM ² American  

1. millimole; millimoles.

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mm. ³ American  

abbreviation

1. thousands.

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mm. ⁴ American  

abbreviation

1. Music. measures.

2. millimeter; millimeters.

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MM. ⁵ American  

abbreviation

1. Messieurs.

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M.M. ⁶ American  

abbreviation

1. Master Mason.

2. Master Mechanic.

3. Master of Music.

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mm ¹ British  

symbol

1. millimetre

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abbreviation

1. mutatis mutandis

MM ² British  

abbreviation

1. Military Medal

2. the French equivalent of Messrs

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mm ³ British  

abbreviation

1. Myanmar

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mm Scientific  

1. Abbreviation of millimeter

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Etymology

Origin of mm.

From the Latin word millia

Example Sentences

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

Researchers collected 4,350 animals larger than 0.3 mm living in and on the seabed.

From Science Daily • Feb. 2, 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

Some areas may see torrential downpours of 30-50 mm of rain, which could lead to flash flooding.

From BBC • Jun. 12, 2025

Your pencil—mechanical, size .7 mm graphite only—glides across the paper.

From "Legendary Frybread Drive-In" by Cynthia Leitich Smith