Pertaining to the Sun (the star Sol).

solar energy

(obsolete) A loft or upper chamber forming the private accommodation of the head of the household in a medieval hall; a garret room.

Of or pertaining to the sun; proceeding from the sun

(astrology, obsolete) Born under the predominant influence of the sun.

Measured by the progress or revolution of the sun in the ecliptic; as, the solar year.

Produced by the action of the sun, or peculiarly affected by its influence.