plug in

US /plʌɡ ɪn/
UK /plʌɡ ɪn/
"plug in" picture
1.

to connect an electrical device to a power source or another device by inserting a plug into a socket

:
Don't forget to plug in your phone before you go to bed.
Can you plug in the lamp for me?
2.

to involve someone in an activity or group

:
We need to plug in more volunteers for the event.
The new employee quickly plugged in to the team's workflow.