the quality of being heavy; that property of bodies by which they tend toward the center of the earth; the effect of gravitative force, especially when expressed in certain units or standards, as pounds, grams, etc.-the quantity of heaviness; comparative tendency to the center of the earth; the quantity of matter as estimated by the balance, or expressed numerically with reference to some standard unit; as, a mass of stone having the weight of five hundred pounds.-hence, pressure; burden; as, the weight of care or business.-importance; power; influence; efficacy; consequence; moment; impressiveness; as, a consideration of vast weight.-a scale, or graduated standard, of heaviness; a mode of estimating weight; as, avoirdupois weight; troy weight; apothecaries' weight.-a ponderous mass; something heavy; as, a clock weight; a paper weight.-a definite mass of iron, lead, brass, or other metal, to be used for ascertaining the weight of other bodies; as, an ounce weight.-the resistance against which a machine acts, as opposed to the power which moves it.-to load with a weight or weights; to load down; to make heavy; to attach weights to; as, to weight a horse or a jockey at a race; to weight a whip handle.-to assign a weight to; to express by a number the probable accuracy of, as an observation.  see weight of observations, under weight.