1.
see hang 1
2.
If you hang up or you hang up the phone, you end a phone call. If you hang up on someone you are speaking to on the phone, you end the phone call suddenly and unexpectedly.
Mum hung up the phone...
Don’t hang up!...
He said he’d call again, and hung up on me.
PHRASAL VERB : V P n (not pron) , V P , V P on n
3.
You can use hang up to indicate that someone stops doing a particular sport or activity that they have regularly done over a long period. For example, when a footballer hangs up his boots, he stops playing football.
Keegan announced he was hanging up his boots for good...
PHRASAL VERB : V P n (not pron) , also V n P
4.
see also hang-up , hung up