1.
see hang 1
2.
If you ~ or you ~ the phone, you end a phone call. If you ~ on someone you are speaking to on the phone, you end the phone call suddenly and unexpectedly.
Mum hung up the phone...
Don’t ~!...
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 ~ 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