Mil can refer to a number of different things.

• In English units of measurement, a mil is a unit of length 1/1,000 inch long. The term 'mil' is also used colloquially to mean 'millimetre' or 'millilitre'.

• A mil in Norway and Sweden is a distance of 10 kilometres. The term originates from a pre-metric mil (in earlier times rast) of slightly over 10 km, denoting a suitable distance between rests when walking. For geographical distances the term is used probably more than the kilometre. It is also used commonly for measuring vehicle fuel consumption, liters per mil means liters consumed per 10 km.

• In angular measure, a mil is 1/6,400 of a full circle. It is approximately a milliradian and is convenient because 1 mil at 1 km is about 1 m (and so 100 mils at 2 km is about 200 m). There are 1600 mils in 90 degrees, 17.8 mils in one degree. This mil is usually used in artillery discussion. It is also used in long-range precision rifle shooting, where the crosshairs on riflescopes are often calibrated in mils. This type of riflescope is usually referred to as a mil-dot scope.

• mil is sometimes used as an abbreviation for millions.

• .mil is the top level domain for the US Military

• Mil Spec is short for Military Specification, for equipment or materiel.

• Mil is the short name of a Soviet/Russian helicopter manufacturer: see Mil Moscow Helicopter Plant.

• mil is unit of angular measurement used by the Canadian military. 1 mil represents a 1 metre distance at a range of 1km. There are 6400 mils in a full circle.

See also: mill