Building, Principal: A building in which is conducted the principal use of the lot on
which it is located. Business or Professional Office: A business establishment, which does not offer a product or
merchandise for sale to the public but offers a professional service to the public. However, general or
personal service establishments are not to be included in the definition of business offices. Cellar: A portion of a building, partly or entirely below grade, which has more than one half of its
height measured from finished floor to finished ceiling, below the average established finished grade
of the ground adjoining the building. A cellar is not deemed a story. Child Care Center: A child care center as that term is defined in G.L. c. 15D, s. 1A. Commercial Recreation, Indoors: Entertainment and recreational facilities operated as a business
for gain, including but not limited to bowling alley, theater, fitness center, or sports arena, provided
such use is housed indoors in sound-insulated structure protecting neighborhood from inappropriate
noise in any season. Commercial Recreation, Outdoors: Golf, swimming, tennis, or other outdoor recreational facility. Communications Tower and Wireless Communications Facility: A tower, including antennas and
accessory structures, if any, built for wireless communications, including, but not limited to, radio,
television, cellular, and digital communications, which facilitates the provision of wireless
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communications services. Community Facilities: Premises owned and operated by a governmental or chartered nonprofit
organization, but not including fraternal sports, or similar membership organizations. Condominium: A structure in which an individual owns separately one or more single dwelling units
in a multi-unit building. He and the owners of other units have an undivided interest in the common
areas and facilities that serve the project.