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
The researchers acquired these bits from four individuals and cut out circles one or two millimeters across for genetic sequencing.
—
Amber Dance, Smithsonian Magazine, 17 Jan. 2025
One would-be assassin nicked his ear, coming within millimeters of murdering him on national television.
—Yaakov Katz, Newsweek, 17 Jan. 2025
Your blood pressure reading is displayed on the screen in millimeters of mercury (mmHg), often as a fraction (e.g., 120/80).
—Vanessa Caceres, Verywell Health, 16 Jan. 2025
On a telescope, magnification can be calculated by dividing its objective lens's focal length by the eyepiece's focal length, both expressed in millimeters.
—Jamie Carter, Space.com, 15 Jan. 2025
See all Example Sentences for millimeter 
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Amber Dance, Smithsonian Magazine, 17 Jan. 2025
One would-be assassin nicked his ear, coming within millimeters of murdering him on national television.
—Yaakov Katz, Newsweek, 17 Jan. 2025
Your blood pressure reading is displayed on the screen in millimeters of mercury (mmHg), often as a fraction (e.g., 120/80).
—Vanessa Caceres, Verywell Health, 16 Jan. 2025
On a telescope, magnification can be calculated by dividing its objective lens's focal length by the eyepiece's focal length, both expressed in millimeters.
—Jamie Carter, Space.com, 15 Jan. 2025
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 23 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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