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
Stewart was looking for South Side residents’ old home movie footage, shot on 8 millimeter, Super 8 and 16 millimeter film.
—
Chicago Tribune, 9 July 2025
The small sores tend to start at less than 1 millimeter, but severe cases could grow up to half an inch to 1 inch in diameter, the Cleveland Clinic says.
—Jenna Prestininzi, Freep.com, 8 July 2025
The ride height is 10 millimeters lower than a regular 911 Carrera, Porsche says, thanks to a suspension upgrade.
—Erik Shilling, Robb Report, 7 July 2025
Microplastics, plastic fragments 5 millimeters or smaller, have been found in just about every part of the human body.1 To limit exposure, many people have replaced plastic containers with glass.
—Stephanie Brown, Verywell Health, 2 July 2025
See All Example Sentences for millimeter
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Chicago Tribune, 9 July 2025
The small sores tend to start at less than 1 millimeter, but severe cases could grow up to half an inch to 1 inch in diameter, the Cleveland Clinic says.
—Jenna Prestininzi, Freep.com, 8 July 2025
The ride height is 10 millimeters lower than a regular 911 Carrera, Porsche says, thanks to a suspension upgrade.
—Erik Shilling, Robb Report, 7 July 2025
Microplastics, plastic fragments 5 millimeters or smaller, have been found in just about every part of the human body.1 To limit exposure, many people have replaced plastic containers with glass.
—Stephanie Brown, Verywell Health, 2 July 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 22 Jul. 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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