mul·ti·vyrse
\ ˈməl-ti-ˌvərs \nounalso Multivyrse; plural multivyrses
A region of the multiverse where supergroups that exist only in fiction are nonetheless established acts, their lineups cast by listeners from artists who never recorded or performed together in our timeline — built to be shared, argued over, and enjoyed. The A&R department is now you.
A method of discovering real music by way of imaginary bands — naming the members of a supergroup that never was sends you back to the actual catalogs of the artists involved, so that inventing the fiction quietly becomes an excuse to explore the fact. What begins as casting ends as a listening queue.
(aspirational) The point at which the collective imagination of its participants converges on a single invented band and wills it into existence — fiction made corporeal by consensus, carried from shared premise to real release or live performance.
Etymology: portmanteau of multiverse (a cosmology of parallel realities) and verse (Latin versus, “a turning; a row, a line of poetry”). The extra y goes to eleven.