Oasis grace Engineering projects, The definition of a facility is a building or room which was created to serve a specific purpose or is the ease of doing something. An example of a facility is a gym. An example of facility is the ability to accomplish many tasks in a timely and efficient manner. Facilities are buildings, pieces of equipment, or services that are provided for a particular purpose. Hotels may charge for the use of leisure facilities such as swimming pools and gyms. Facilities Maintenance, Service Requests and Projects Overview. Definition of “Facilities Maintenance” Maintenance activities include keeping spaces, structures and infrastructure in proper operating condition in a routine, scheduled, or anticipated fashion to prevent failure and/or degradation.