Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun UK An SI/MKS unit of measure, the length of 1/1000 of a metre. Symbol: mm

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a metric unit of length equal to one thousandth of a meter

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Latin milli- ("thousand") + metre

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