A blot, or stain, refers to a mark or discoloration on a surface, often caused by the absorption of a substance. Common examples include ink, food, or paint that can leave a visible spot on materials like fabric, paper, or walls. Blots can vary in size and intensity, depending on the type of substance and the surface affected. Removing a blot typically involves cleaning methods that may include water, soap, or specialized stain removers. The effectiveness of these methods can depend on the nature of the stain and the material involved, such as cotton, wool, or leather.