the amount or quantity of heaviness or mass; amount a thing weighs.
Physics. the force that gravitation exerts upon a body, equal to the mass of the body times the local acceleration of gravity: commonly taken, in a region of constant gravitational acceleration, as a measure of mass.
a system of units for expressing heaviness or mass: avoirdupois weight.
a unit of heaviness or mass: The pound is a common weight in English-speaking countries.
a body of determinate mass, as of metal, for using on a balance or scale in weighing objects, substances, etc.