Webster's Revised Unabridged Dictionary · 1913

mil

mil , noun

1.
an obsolete monetary unit of Cyprus equal in value to f of a pound.
2.
a unit of length equal to f inch, used especially in measuring the thickness of sheets of materials.
3.
one milliliter; -- used mostly in informal speech. [laboratory slang]
4.
a unit of angular size equal to f of 360 degrees; -- it is used especially in artillery ranging.

mil , noun

[by contraction from million.]

One million dollars; as, his new house cost over a mil. [slang]