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English definition of “millimetre”

millimetre

noun [C] uk UK (US millimeter)   /ˈmɪl.ɪˌmiː.tər/ us    /-t̬ɚ/ (written abbreviation mm)
B1 a unit of length that is equal to 0.001 metresMeasurements of length and distance
(Definition of millimetre from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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