friction /ˈfrikʃən/ n. ［u］1. 摩擦，摩擦力: Oil is put in machinery to reduce the friction. 向机械里加油是为了减少摩擦力。In designing a machine it is necessary to reduce friction as much as possible.在设计一种机器时, 必须尽可能减低摩擦。2. 冲突，不和：Family frictions can interfere with a child's schoolwork.家庭中的争吵会影响孩子的学业。