seller Syllabification: (sell·er)Pronunciation: /ˈselər/Translate seller | into German | into Italian | into Spanish Definition of seller noun 1a person who sells something:street sellers of newspapers, flowers, etc. (the seller) the party in a legal transaction who is selling:the seller may accept the buyer’s offer 2 [with adjective] a product that sells in some specified way:the game will undoubtedly be the biggest seller of the yearPhrases seller's (or sellers') market an economic situation in which goods or shares are scarce and sellers can keep prices high. seller in other Oxford dictionaries Definition of seller in the British & World English dictionary