millimeter
noun
mil·li·me·ter
ˈmi-lə-ˌmē-tər 
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
Engineers used advanced steel-concrete composite techniques and deployed some of the largest cranes to position components with millimeter precision.
—
Kaif Shaikh, Interesting Engineering, 3 Oct. 2025
Luigi Avantaggiato PacBio’s Wenger notes that the 25-million-well chips that underpin its Revio system are still being fabricated on 200-millimeter semiconductor wafers.
—IEEE Spectrum, 2 Oct. 2025
According to the complaint, both Collins and Robledo carried 9-millimeter semiautomatic pistols to the protests and have lawful permits for the weapons.
—Bill Kirkos, CNN Money, 29 Sep. 2025
But da Costa and his team, as part of the Microns project, a large-scale effort to fully map out a 1-cubic-millimeter portion of a mouse’s visual cortex, discovered that inhibitory neurons are very specific in choosing what cells to inhibit.
—Yasemin Saplakoglu, Quanta Magazine, 29 Sep. 2025
See All Example Sentences for millimeter
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Kaif Shaikh, Interesting Engineering, 3 Oct. 2025
Luigi Avantaggiato PacBio’s Wenger notes that the 25-million-well chips that underpin its Revio system are still being fabricated on 200-millimeter semiconductor wafers.
—IEEE Spectrum, 2 Oct. 2025
According to the complaint, both Collins and Robledo carried 9-millimeter semiautomatic pistols to the protests and have lawful permits for the weapons.
—Bill Kirkos, CNN Money, 29 Sep. 2025
But da Costa and his team, as part of the Microns project, a large-scale effort to fully map out a 1-cubic-millimeter portion of a mouse’s visual cortex, discovered that inhibitory neurons are very specific in choosing what cells to inhibit.
—Yasemin Saplakoglu, Quanta Magazine, 29 Sep. 2025
See All Example Sentences for millimeter
Cite this Entry
“Millimeter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/millimeter. Accessed 8 Oct. 2025.
Copy CitationKids Definition
millimeter
noun
mil·li·me·ter
ˈmil-ə-ˌmēt-ər
: 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
: one thousandth of a meter
—abbreviation mm
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