0 how heavy someone or something is -- 重さ, 体重
2 If someone loses weight, they become lighter and thinner. -- やせる
3 If someone puts on weight or gains weight, they become heavier and fatter. -- 体重が増える, 太る
4 to work as hard as other people in a group -- (共同作業で)自分の役目を精一杯果たす
The rest of the team complained that Sarah wasn’t pulling her weight.