A swing door is a hinged door that opens and closes by swinging on a set of hinges. It is one of the most common types of doors in residential and commercial spaces. When pushed or pulled, the door swings along its vertical axis to provide access between rooms, areas, or indoor and outdoor spaces. Swing doors can be designed to open inward or outward, depending on the specific needs of the space and building regulations. They are available in various materials, styles, and sizes to suit different architectural and functional requirements.