1) French word used in English 2) Metric linear unit 3) Millimeter 4) Unit of length 1) Millimeter 2) Mm 
The millimetre (International spelling as used by the International Bureau of Weights and Measures) or millimeter (American spelling) (SI unit symbol mm) is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length. It is equal to 1,000 micrometres and 1,000,000 nanometres. There are 25.4 mm in ...
• (n.) A lineal measure in the metric system, containing the thousandth part of a meter; equal to .03937 of an inch. See 3d Meter.
unit of length equal to 0.001 metre in the metric system and the equivalent of 0.03937 inch.
A measure of distance. 10 millimetres = 1 centimetre. (10 mm = 1 cm).