Real Dictionary

star
countable noun: A star is a large ball of burning gas in space. Stars appear to us as small points of light in the sky on clear nights.

star in American English
any of the luminous celestial objects seen as points of light in the sky; esp., any self-luminous celestial body having continuous nuclear reactions which send heat, light, etc. in all directions
having exceptional skill and talent; outstanding; excelling others; leading
to mark or set with stars as a decoration
to perform brilliantly; excel
noun: any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night

star in British English
noun: any of a vast number of celestial objects that are visible in the clear night sky as points of light