o ‧ ver ‧ sell /ˌəʊvəˈsel $ ˌoʊvər-/ BrE AmE verb ( past tense and past participle oversold /-ˈsəʊld $ -ˈsoʊld/) [transitive]
1 . to praise someone or something too much:
Tourism on the island is oversold.
2 . to sell more of something than is actually available