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.
Blue light penetrates one millimeter to reduce inflammation and bacteria, and helps your body clock. Beth Landman, The Hollywood Reporter, 4 Dec. 2024 Blood pressure is measured by two numbers, expressed in millimeters of mercury (mm Hg): the systolic (upper or first) number and the diastolic (lower or second) number. Corey Whelan, Verywell Health, 1 Dec. 2024 The city is sinking at a rate of 1-2 millimeters a year. Lea Lane, Forbes, 30 Oct. 2024 Chiva, just east of Valencia, received 320 millimeters (12.6 inches) of rain in just over four hours, according to the European Severe Weather Database. CNN, 30 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

Cite this Entry

“Millimeter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/millimeter. Accessed 11 Dec. 2024.

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
: one thousandth of a meter
abbreviation mm

More from Merriam-Webster on millimeter

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