1. a device for making and breaking the connection in an electric circuit
2. a change or exchange from one thing to another
3. a thin flexible rod or twig, especially one used for punishment

1. to change or exchange one thing for another
2. to turn a device on or off using a switch

Examples

• Please turn off the light switch when you leave.
• The switch from summer to winter happened quickly this year.
• She decided to switch majors from biology to chemistry.
• Can you switch the TV to channel 5?
• The old teacher used a switch to discipline students.
• I need to switch my flight to an earlier time.
• He switched off the computer before going home.