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
How Fast Does Hair Grow? In a single day, a strand of hair grows about 0.35 millimeters.
—
Nancy Lebrun, Verywell Health, 11 Dec. 2024
The microplastics problem Microplastics are tiny shards of plastic smaller than 5 millimeters.
—Lex Harvey, CNN, 17 Dec. 2024
The system works best when detecting objects about 8 millimeters in diameter.
—IEEE Spectrum, 11 Dec. 2024
Blue light penetrates one millimeter to reduce inflammation and bacteria, and helps your body clock.
—Beth Landman, The Hollywood Reporter, 4 Dec. 2024
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Nancy Lebrun, Verywell Health, 11 Dec. 2024
The microplastics problem Microplastics are tiny shards of plastic smaller than 5 millimeters.
—Lex Harvey, CNN, 17 Dec. 2024
The system works best when detecting objects about 8 millimeters in diameter.
—IEEE Spectrum, 11 Dec. 2024
Blue light penetrates one millimeter to reduce inflammation and bacteria, and helps your body clock.
—Beth Landman, The Hollywood Reporter, 4 Dec. 2024
See all Example Sentences for millimeter
Dictionary Entries Near millimeter
Cite this Entry
“Millimeter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/millimeter. Accessed 18 Jan. 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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