1. An angular mil, a unit of angular measurement equal to 1⁄6400 of a complete circle. At 1000 metres one mil subtends about one metre (0,98 m). Also 1⁄6000 and 1⁄6300 are used in other countries.
2. A unit of measurement equal to 1⁄1000 of an inch, usually used for thin objects, such as sheets of plastic.