sellersell·er /ˈselə-ər/ noun [countableC]1COMMERCEa person or organization that sells somethingMost sellers use an estate agent to set a price and advertise the property.
seller ofIn the UK sellers of alcohol must be at least 18.
→ net seller → short seller2good/bad/big etc sellerMARKETING a product that sells well or badlyThe book is among the 10top sellers of all time.
Frozen yoghurt has been a big seller over the past two years.
→ see also BEST-SELLER, bookseller