[Callers] Medleys

I am assuming that a 'medley' in contra dancing means that the band will play a series of different songs--usually 3--in immediate succession with no noticeable break between them, but that the dancers will continue to dance the same figure that they began with the walk-thru. And that once the dancers have 'mastered' that figure, they eventually will not need any further verbal cues from the caller, even though the music changes. Is that correct, or do some have a different definition of "medley"?