In switch language, open means to disconnect, or break the circuit. Some people call this turned off. Closed, is to connect, or make the circuit. Some people call this turne … d on. In the case of a normally open switch, the switch is open (off) unless something takes action on the switch. Pushes a button for example, or holds a magnet near the switch, or other active force. A normally closed switch is closed (on) unless some force causes the switch to be opened.