Of or pertaining to the universe, especially to the universe regarded as subject to a harmonious system of laws.Hence Pertaining to universal order; harmonious, as the universe; orderly: the opposite of chaotic.Forming a part of the material universe, especially of what lies outside of the solar system.In astronomy, visible for the first time before sunrise: only in the phrase the cosmical setting of a star.Inconceivably prolonged or protracted, like the periods of time required for the development of great astronomical changes; immeasurably extended in space; universal in extent.Of or pertaining to cosmism: as, the cosmic philosophy.n. A name proposed by H. L. Fairchild, in accordance with the new planetesimal hypothesis, for the primitive massive rocks.