noun

1. SUN, the star that is the source of light and heat for the planets in the solar system
2. SUN, any star around which a planetary system revolves
3. SUN, a person considered as a source of warmth or energy or glory etc
4. SUN, the rays of the sun
5. SUN, first day of the week; observed as a day of rest and worship by most Christians
6. SUN, the star that the Earth moves around and that gives the Earth heat and light
7. SUN, any star that has planets which move around it
8. SUN, the heat or light produced by the sun : sunshine or sunlight

verb

1. SUN, expose one's body to the sun
2. SUN, expose to the rays of the sun or affect by exposure to the sun
3. SUN, to sit or lie in the light of the sun especially in order to make your skin darker

1. The rain has stopped and the sun is shining.
2. The sun rises in the east and sets in the west.
3. the warmth of the sun's rays
4. People sunned themselves on the hillside.