Millimeter - Definition, Meaning & Synonyms

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SKIP TO CONTENT millimeter /ˌˈmɪləˌmidər/ /ˈmɪlɪmitə/ IPA guide

Other forms: millimeters

A millimeter is a tiny unit of measurement. The thickness of a dime is a little more than a millimeter, and there are a thousand millimeters in a meter.

If you're using metric units to measure the length of something, you'll be dealing in meters and variations on meters, including millimeters. Look at a ruler that includes centimeters, the units of metric measurement that are closest in length to inches. The smallest units marked on the ruler are millimeters — there are ten of them in each centimeter. Although the word millimeter sounds like "million," it actually means "thousandth of a meter."

Definitions of millimeter

noun a metric unit of length equal to one thousandth of a meter synonyms: millimetre, mm see moresee less type of: metric linear unit a linear unit of distance in metric terms

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Vocabulary lists containing millimeter

Measurement and Data

How does your vocabulary measure up? To find out, study this list of terms related to measurement and data. You'll review units for measuring length, mass, and volume, mathematical operations, models for representing data, and more. To sum up, this list will be a great addition to your next study session.

Florida's B.E.S.T. Roots: meter, metr

This vocabulary list features words derived from the Greek metron meaning "measure."

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