solar system

Short definition from Wiktionary

Proper noun

1. 1
   Alternative letter-case form of Solar System; the Sun and all the objects in orbit around it.
2. 2
   The Sun and all the heavenly bodies that orbit around it, including the eight planets, their moons, the asteroids, and comets.
3. 3
   Alternative letter-case form of Solar System.

Noun

1. 1
   Any orbital system of at least one fusor and other heavenly bodies, like planets and other objects.
2. 2
   Ellipsis of solar power system (“electric power system that supplies usable solar power by means of photovoltaics”).