A sieve is a kitchen tool used to separate solid particles from liquids or to sift dry ingredients. It typically consists of a mesh or perforated surface held in a frame, allowing smaller particles to pass through while retaining larger ones. Commonly made from materials like stainless steel or plastic, sieves come in various sizes and shapes for different culinary tasks. In addition to cooking, sieves are also used in other fields, such as construction and science, for filtering materials or separating substances. They play a crucial role in processes like brewing and baking, ensuring the desired texture and consistency of the final product.