add-on

Definitions of add-on
  1. noun
    a supplementary component that improves capability
    synonyms: accessory, appurtenance, supplement
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    auto accessory
    an accessory for an automobile
    computer accessory
    an accessory for a computer
    fitting
    a small and often standardized accessory to a larger system
    fixings, trimmings
    the accessories that normally accompany (something or some activity)
    gas fitting
    the fitting (pipes or valves or meters) that convey gas from the gas main to the gas fixtures of a building
    pipe fitting, pipefitting
    fitting consisting of threaded pieces of pipe for joining pipes together
    receptacle
    an electrical (or electronic) fitting that is connected to a source of power and equipped to receive an insert
    type of:
    component, constituent, element
    an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system
  2. noun
    a component that is added to something to improve it
    synonyms: addition, improver
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    additive
    something added to enhance food or gasoline or paint or medicine
    afterthought
    an addition that was not included in the original plan
    annex, annexe, extension, wing
    an addition that extends a main building
    attachment
    a supplementary part or accessory
    elongation, extension
    an addition to the length of something
    addendum
    a thing that is added or will be added
    adjuvant
    an additive that enhances the effectiveness of medical treatment
    ell
    an extension at the end and at right angles to the main building
    artificial additive, food additive
    an additive to food intended to improve its flavor or appearance or shelf-life
    hood, lens hood
    a tubular attachment used to keep stray light out of the lens of a camera
    type of:
    component, constituent, element
    an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system
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