Star  —n. 1 celestial body appearing as a luminous point in the night sky. 2 large naturally luminous gaseous body such as the sun. 3 celestial body regarded as influencing fortunes etc. 4 thing like a star in shape or appearance. 5 decoration or mark of rank or excellence etc., usu. With radiating points. 6 a famous or brilliant person; principal performer (star of the show).