"Parallel" does mean "contemporaneous", yes. Since "time" is not what everyone believes is more fundamental than your own interpretation, it would be inappropriate to use that word for those of us who do not. It would be like a non-religious person being willing to use the word, "God" instead of "Universe" simply to appeal to the religious, although we do so metaphorically. [Like Einstein might say, "God does not throw dice." This very statement of his has actually been used to suggest that Einstein was religious by many which only proves why one should try to prevent using the terms of others in context of their own ideas without care.]Obvious Leo wrote:What does parallel mean? Do you mean contemporaneous?Scott Mayers wrote:it can be the case that each world in your perspective can still be parallel.
So "parallel" is the appropriate term I use. If you prefer "contemporaneous" that is alright. If it is, then are you fine with this interpretation when you replace "parallel" with your preferred meaning, "contemporaneous", or are you setting up a scarecrow by begging me to transfer to another definition you have in mind? [Not accusing you of this, just wondering if you intended a bad interpretation of "contemporaneous".]
Another good reason why "parallel" is more useful is because if you notice in the illustration, one world event may be longer or shorter with respect to the stages between expansion-to-collapse. Since we cannot possibly transfer to those places (as far as we can be certain of), especially where such 'times' in other places may be mismatched, it doesn't matter at this point whether we perceive one interpretation over the other. Both work. The question would only arise if we had to argue whether we could actually transit to those other worlds, which even most multiverse proponents do not even think is possible regardless.