- 1oversell somebody/something/yourself to say that someone or something is better than they really are He has a tendency to oversell himself.
- 2oversell something (business) to sell too much or more of something than is available The seats on the plane were oversold.
NAmE//ˌoʊvərˈsɛl//[often passive]Verb Forms present simple I / you / we / they oversell
he / she / it oversells
past simple oversold
-ing form overselling