Most of the dictionaries define that rebirth is a second or new birth. I have observed that this word is used for a soul that takes birth as the same species. For instance, looking at a kid who dances, walks, talks exactly like the great terpsichorean might be called the rebirth of MJ or MJ reborn.
My question is does the term 'rebirth' restricts to taking birth again as the same species? Or rebirth of the soul could be anything? The last birth, the soul took birth as a human and now could be an insect? Or we refer rebirth only if that soul is again human?
We judge rebirth of a person by looking whether his/er characteristics match with that of the dead person but here, if I use the word 'rebirth' it's merely the next birth of that soul and it has nothing no resemblance, similarity or 'character-matching' with the previous birth.