The term 'Airport Bus' can be summarized as a SHUTTLE service that provides transportation to and from airports. It is also known as an airport SHUTTLE, which is a seven-letter word. Airport buses are typically used by travelers who need to get to and from the airport quickly and conveniently. They are usually operated by private companies and provide door-to-door service. Airport buses are often more cost-effective than other forms of transportation, such as taxis or rental cars.