or ~to
1.
If you plug a piece of electrical equipment into an electricity supply or if you plug it in, you push its ~to an electric socket so that it can work.
They plugged in their tape-recorders...
I filled the kettle while she was talking and plugged it in...
He took the machine from its bag and plugged it into the wall socket...
PHRASAL VERB: V P n (not pron), V n P, V n P n
2.
If you plug one piece of electrical equipment into another or if you plug it in, you make it work by connecting the two.
They plugged their guitars into amplifiers...
He plugged in his guitar.
PHRASAL VERB: V n P n, V P n (not pron)
3.
If one piece of electrical equipment plugs in or plugs into another piece of electrical equipment, it works by being connected by an electrical cord or lead to an electricity supply or to the other piece of equipment.
A CD-I deck looks like a video recorder and plugs into the home television and stereo system...
They’ve found out where the other speaker plugs in.
PHRASAL VERB: V P n, V P
4.
If you plug something into a hole, you push it into the hole.
Her instructor plugged live bullets into the gun’s chamber.
PHRASAL VERB: V n P n