Definition of aftermarket noun from the Oxford Advanced American Dictionary

     

    aftermarket

     noun
    noun
    NAmE//ˈæftərˌmɑrkət//
     
    [singular]
     
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  1. 1the demand for equipment and services that are related to a purchase the aftermarket for computer accessories the automotive aftermarket
  2. 2 (finance) the financial markets such as stock exchanges where shares in companies are bought and sold, after their original issue I sold the stock in the aftermarket at $19.25. declining aftermarket prices