"Multiverse" can have several different meanings, causally disconnected regions of spacetime in General Relativity, landscape ideas in String theory or all the

"Multiverse" can have several different meanings, causally disconnected regions of spacetime in General Relativity, landscape ideas in String theory or all the worlds of the many worlds interpretation. However, since non of them so far produced actual, that is observable, physics, it is probably not important to distinguish between these meanings in a popular discussion.