1. the star that Earth orbits around, which provides light and heat
2. the light and heat from this star
3. any star that has planets orbiting around it
Usage: astronomy

1. to expose oneself to sunlight

Examples

• The sun rises in the east and sets in the west.
• We need sun to help plants grow.
• She sat in the sun to get warm.
• The sun was shining brightly through the window.
• Scientists study other suns in distant solar systems.
• The cat likes to sun itself on the porch.
• Too much sun can cause sunburn.