From Longman Dictionary of Contemporary Englishoversello‧ver‧sell /ˌəʊvəˈsel $ ˌoʊvər-/ verb (past tense and past participle oversold /-ˈsəʊld $ -ˈsoʊld/) [transitive] 1 PRAISEto praise someone or something too much Tourism on the island is oversold.2 to sell more of something than is actually available→ See Verb table
Examples from the Corpus
oversell• The movie was oversold and ended up disappointing everyone.From Longman Business Dictionaryoversello‧ver‧sell /ˌəʊvəˈselˌoʊvər-/ (also over-sell) verb (past tense and past participle oversold /-ˈsəʊld-ˈsoʊld/) [transitive]1MARKETINGto say that something you are selling is better, more useful etc than it really isVendors tend to oversell the software. That gives people more confidence to work with it than they should have.2COMMERCEto sell more of something than is availableThey regularly oversold seats on their flights. —overselling noun [uncountable]He’s investigating the possible overselling of time-share resorts.→ See Verb table 