a unit of force. One newton is equal to the force that would give a mass of one kilogram an acceleration (= an increase in speed) of one metre per second per second. 牛(顿)(力的单位,1 牛顿等于使 1 千克质量的物体产生 1 米每平方秒的加速度所需要的力) Word Originearly 20th cent.: named after Sir Isaac Newton (1642-1727), the English mathematician and physicist.