A unit of mass in the avoirdupois system of units equal to 16 ounces or 7000 grains. It is equivalent to 0.453592 kg or slug, and is sometimes abbreviated lbm. In industrial and commercial usage, the unqualified term "pound" may be used to mean pound-mass (instead of pound-force), but this usage is to be discouraged.

2000 pound-masses equal one ton. A metric pound is defined to be 500 grams.

Avoirdupois System of Units, Grain, Mass, Metric Pound, Ounce, Pound, Pound-Force, Pound-Volume, Troy Pound, Slug