dip dIp n [C usually sing] 下降 They did not see the dip in the road. 他们没看见路面的下倾。 The sudden dip in the temperature caused snow on the roads to freeze. 温度突然下降，使公路上的雪结了冰。 A dip-switch is the device that you use to dip the lights on a vehicle. （车辆的）大灯变光开关