From Longman Dictionary of Contemporary Englishcaptive marketcaptive marketthe people who must buy a particular product or service, because they need it and there is only one company selling it → captive
Examples from the Corpus
captive market• In the past, manufacturers had a captive market.• Philip Leapor did not have a captive market.From Longman Business Dictionarycaptive marketˌcaptive ˈmarket [singular]ECONOMICS a market in which buyers have no choice about which product to buy or which seller to buy fromThe company has gained a captive market with its baby-food contract and exclusive access to 107,000 infants in the state. → market 