B1
a small object that you push up or down with your finger to turn something electrical on or off
Dictionary examples:
I wish there was a switch to turn off my boss's boring meetings. (0.0)
My cat thinks the light switch is a toy for midnight disco parties. (0.0)
The power went out, so we played 'Find the switch in the dark.' (0.0)
a light switch (14.7)
Can you flip the switch? (51.5)