cosmic UK /ˈkɒz.mɪk/US /ˈkɑz.mɪk/ adjective4 •Of or from or pertaining to the cosmos or universe. •Characteristic of the cosmos or universe; inconceivably great; vast. •Of or relating to abstract spiritual or metaphysical ideas.Humpty Dumpty is the cosmic egg, the wall, the edge between transcendence and existence. As nothing breaks up into the world of things, the movement toward entropy becomes irreversible. — 1981 •(old-fashioned) Rising or setting with the sun; not acronycal. formsmore cosmic · most cosmic