Word: 开关 (kāiguān) Traditional: 開關 开关 dictionary entry kāiguān power switch; gas valve; to open the city (or frontier) gate; to open and close; to switch on and off Full dictionary entry for 开关 Example sentences using 开关 2 sentences, showing page 1 of 1. 她按了开关。 Tā àn le kāiguān. She pressed the switch. 这个装置是用开关启动的。 Zhège zhuāngzhì shì yòng kāiguān qǐdòng de. This device is actuated by a switch.