(stahr) n. 1. a celestial body appearing as a point of light in the night sky. 2. (in astronomy)any large, light-emitting gaseous ball, such as the sun. 3. a heavenly body regarded as influencing a person's fortunes, thank your lucky stars. 4. a figure or object or ornament with rays or radiating points, an asterisk, a star-shaped mark indicating a category of excellence. 5. a brilliant person, a famous actor or actress or other performer. star v. to put an asterisk or star symbol beside(a name or item on a list.)