interstellar

the boundary (roughly 100 AU from the sun) between the interplanetary medium and the interstellar medium

Between or among constellations or stars; interstellar.

an immense cloud of gas (mainly hydrogen) and dust in interstellar space

n a medicinal liquid preparation intended for use in an atomizer n cloudiness of the urine n an immense cloud of gas (mainly hydrogen) and dust in interstellar space n (pathology) a faint cloudy spot on the cornea

n a spacecraft designed to carry a crew into interstellar space (especially in science fiction)