I would define ghosting as abandonment of a relationship, cutting off all ties or ways of communication, especially without any sort of end-of-times convo or closure given to the other party
this has happened to me with a close friend who misunderstood something I said, read WAY into it, thinking I was talking about him (even though I told the story in third person..)
it took me a while to figure out what had happened. we had no mutual friends to go to for insight. he deleted every way for me to contact him and I'm still confused and hurt. we were very close
I do think there is a time and place for ghosting, but usually just in extenuating circumstances. most people deserve that talk and that explanation.
it's a great way to make someone feel replaceable 😔