noun🔗ShareMilímetroAn SI/MKS unit of measure, the length of 1/1000 of a meter. Symbol: mm"The carpenter carefully measured the wood, marking a line every millimeter to ensure a precise fit. "El carpintero midió cuidadosamente la madera, marcando una línea cada milímetro para asegurar un ajuste preciso.unitmathsciencetechnicalChat with AIVocabulary GamePractice Reading