Added 9 October 2026 best-selling adjective Categories: Describing WordsObscure Words adjective ! Definition from WordNet 3.1, Princeton University. More about best-selling at Wordnik → Where our words come from → Selling in great numbers. a best-selling novel Related Words: popularsuccessfulbetterprosumerupmarketpremiumhigh-classluxurysuperpopularmegapopular Back to today's word