noun

1. the self-luminous, gaseous central star of the solar system: magnitude, -26; mean distance from the earth, c. 149.6 million km (c. 93 million mi); diameter, c. 1.4 million km (c. 864,000 mi); mass, c. 332,000 times that of the earth; volume, c. 1.3 million times that of the earth; mean density, c. 0.25 times that of the earth; central temperature, c. 15 to 20 million degrees K; surface temperature, c. 6,000°K; rotational period, c. 27 earth days: with the
2. the heat or light of the sun to lie in the sun
3. any star that is the center of a planetary system
4. something like the sun, as in warmth or brilliance

Etymology: ME sunne < OE, akin to Ger sonne, Goth sunnō < IE *sun-, *swen-, var. of base *sāwel- > L sol, Gr hēlios

transitive verb sunned, sunning sun′·ning

intransitive verb