millimeter
🇺🇸
/ˈmɪlimiːtər/
🇬🇧
/ˈmɪlimiːtə(r)/
a very small unit for measuring length, equal to one thousandth of a meter
The gap between the two parts is only one millimeter wide.
两个部件之间的间隙仅有一毫米宽。