solar system so·lar·sys·tem fairly common noun 1. the sun with the celestial bodies that revolve around it in its gravitational field Synonymssolar system Related words Broader terms system Parts heliosphere Part of interplanetary mediumasteroidEarthJupiterMarsMercuryNeptuneplanet WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
