- noun rays which are emitted by the Sun
- noun the total electromagnetic radiation given off by the sun
- Energy from the sun, which can be absorbed and converted into heat energy, reflected or transmitted.
- electromagnetic energy radiated by the sun, which includes a wide interval of wavelengths. The solar radiation arriving on the earth's surface is mostly in the visible light, infrared, and ultraviolet regions. solar radio emission Solar radiation occurring in the RF region.