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1. verb To disconnect a phone call. The term is often used to mean to end the call in the middle of the conversation, but it can also mean to disconnect the call when it is finished. Don't you dare hang up on me, I'm not done issuing my complaint! I can't hear you anymore, it must be a bad signal. I'm going to hang up now, so call me back if you can hear this.
2. noun A phone call disconnected by someone, typically the caller. Usually hyphenated. The phone's been ringing all day, but it's just been a bunch of hang-ups. I think someone's pranking us.
3. noun An impediment of some kind, usually an emotional or psychological insecurity, that prevents a person from making progress in a situation. Usually hyphenated. Jeff's personal hang-up is that he always felt like his parents supported his brother more than they supported him.
hung up (on someone or something)
obsessed with someone or something; devoted to someone or something. John is really hung up on Mary. She's hung up, too. See how she smiles at him.
see under hang up.