millimeter

noun

mil·​li·​me·​ter ˈmi-lə-ˌmē-tər How to pronounce millimeter (audio)
variants US millimeter or British millimetre
: a unit of length equal to ¹/₁₀₀₀ meter see Metric System Table

Examples of millimeter in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Trump survived by millimeters a would-be assassin’s bullet at a rally in Butler, Pennsylvania. —Bill Barrow, Fortune, 4 Nov. 2024 The walls are lined with 50 millimeter fiberglass insulation cotton, providing great thermal and sound insulation. —Toni Sutton, People.com, 2 Nov. 2024 Pitt’s pilot, Phillip McKenzie, has two motor arrays implanted in his brain, each the size of a pencil eraser, with 100 electrode tips that go a millimeter and a half into the brain. —Dana MacKenzie, Smithsonian Magazine, 23 Oct. 2024 Micrometeoroids are minuscule pieces of dust, molecules to millimeters in scale, that drift through space. —Jonathan O’Callaghan, Discover Magazine, 21 Oct. 2024 See all Example Sentences for millimeter 

Word History

Etymology

French millimètre, from milli- + mètre meter

First Known Use

1797, in the meaning defined above

Time Traveler
The first known use of millimeter was in 1797

Dictionary Entries Near millimeter

millime

millimeter

millimetric

See More Nearby Entries 

Cite this Entry

“Millimeter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/millimeter. Accessed 26 Nov. 2024.

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Kids Definition

millimeter

noun
mil·​li·​me·​ter ˈmil-ə-ˌmēt-ər How to pronounce millimeter (audio)
: a measure of length equal to ¹⁄₁₀₀₀ meter see metric system table

Medical Definition

millimeter

noun
mil·​li·​me·​ter
variants or chiefly British millimetre
ˈmil-ə-ˌmēt-ər How to pronounce millimeter (audio)
: one thousandth of a meter
—abbreviation mm

More from Merriam-Webster on millimeter

Nglish: Translation of millimeter for Spanish Speakers

Britannica English: Translation of millimeter for Arabic Speakers

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