AMOUNT [U] › how heavy someone or something is: He's about average height and weight.
lose weight › If someone loses weight, they become lighter and thinner: I need to lose a bit of weight.
put on/gain weight › If someone puts on weight or gains weight, they become heavier and fatter.
HEAVINESS [U, no plural] › the quality of being heavy: The shelf collapsed under the weight of the books. OBJECT [C] › something that is heavy: You're not supposed to lift heavy weights after an operation. → See also paper weight