A doormat is a mat placed outside or inside a door for people to wipe their shoes on before entering. Doormats can be made of rough material and are often placed on the floor or ground. 

What do doormats do?

• Clean shoes: Doormats allow people to clean their shoes before entering a building. 

• Improve air quality: Doormats can trap allergens like dust, pollen, and pet dander before they spread into the air or get ground into carpets. 

• Prevent mold and mildew: Doormats can contain mold, mildew, and bacteria instead of spreading them throughout a home. 

Can doormat also refer to a person? 

• Yes, doormat can also be used to describe someone who is treated badly by others but does not complain. For example, someone who loans money that isn't repaid, or who goes out of their way to help others without receiving anything in return.