In my opinion to qualify as ghosting a) you need to have had some form of interview beyond the initial half-hour phone screen that went well so that b) the recruiter or hiring manager/person tells you that they are going to 'call you next week' or something similar so that the next action to take is clearly theirs, then c) you never hear from them again.

I've experienced this often enough that whenever I have an interview that goes exceptionally well then I joke with my wife that I'll probably never hear from them again (and that tends to be the case.)