To remove color or stains from something, typically by using a chemical agent. She decided to bleach the white shirts to remove the coffee stains.
To make something pale or white by exposure to sunlight or a chemical process. The sun can bleach the color out of fabrics if they are left outside for too long.
To become pale or whitened through exposure to light, chemicals, or weather. Over the years, the paint on the wooden fence bleached in the sun.