A measure of the heaviness of an object. The force with which a body is attracted to Earth or another celestial body, equal to the product of the object's mass and the acceleration of gravity. A unit measure of gravitational force: a table of weights and measures. A system of such measures: avoirdupois weight; troy weight. The measured heaviness of a specific object: a two-pound weight. An object used principally to exert a force by virtue of its gravitational attraction to Earth, especially: A metallic solid used as a standard of comparison in weighing. An object used to hold something else down. A counterbalance in a machine. Sports A heavy object, such as a dumbbell, lifted for exercise or in athletic competition. Excessive fat; corpulence: exercising in order to lose weight. Statistics A factor assigned to a number in a computation, as in determining an average, to make the number's effect on the computation reflect its importance. Oppressiveness; pressure: the weight of responsibilities. The greater part; preponderance: The weight of the evidence is against the defendant. Influence, importance, or authority: Her approval carried great weight. See Synonyms at importance. Ponderous quality: the weight of the speaker's words. Sports A classification according to comparative lightness or heaviness. Often used in combination: a heavyweight boxer. The heaviness or thickness of a fabric in relation to a particular season or use. Often used in combination: a summerweight jacket. To add to, by or as if by attaching a weight; make heavy or heavier. To load down, burden, or oppress. To increase the weight or body of (fabrics) by treating with chemicals. Statistics To assign weights or a weight to. To cause to have a slant or bias: weighted the rules in favor of homeowners. Sports To assign to (a horse) the weight it must carry as a handicap in a race. by weight According to weight rather than volume or other measure.