(a) a nearby cluster of stars; spec. one within the galaxy to which the sun belongs (now rare); (b) = local group n. (b).

(a) = local cluster n. (a); (b) (also with capital initials) the cluster of galaxies to which our galaxy belongs, and which also includes the…

A group of galaxies; a supercluster; spec. = Local Supercluster n. at local, adj. n.compounds.