A welcome mat is a decorative item that is placed at the front door of a house or building. It is usually made of a durable material like rubber or coir and is designed to catch dirt, mud, and debris from outside, preventing them from being brought into the premises. Synonyms for a welcome mat include doormat, entrance mat, floor mat, runner, carpet runner, entry rug, and foot pad. Depending on the design and material used, welcome mats can also be used to add some style and personality to the front entrance of a home or business. Whatever the name given to it, a welcome mat serves an important function and should be chosen with care.