What is the defining feature of a garage door?

The defining feature of a garage door is its function as an entrance through which a vehicle may be driven. Unlike traditional doors that serve entry into living spaces or utility areas, a garage door is specifically designed to accommodate the height and width necessary for vehicles to enter and exit a garage. This functionality includes a mechanism to allow for smooth operation, such as being raised and lowered, which is essential for the daily use of vehicles. Garage doors also come equipped with features for security and insulation, further distinguishing them from doors serving other types of spaces.