/af"teuhr mahr'kit, ahf"-/ , n.
1. the market for replacement parts, accessories, and equipment for the care or enhancement of the original product, esp. an automobile, after its sale to the consumer: The company holds a large share in the automotive radio aftermarket.
2. any additional market created by a product after the primary market: Television is the perfect aftermarket for old movies.
3. Stock Exchange. See secondary market .
[ 1935-40; AFTER + MARKET ]