Dealer/ˈdiːlər/ Definition 1 of 3Pro Tip 1/3Business Identity Refers specifically to someone in trade or business, dealing with specific goods or services. She became a recognized art dealer in the city. Pro Tip 2/3Professional Tone When referring to a legitimate business, 'dealer' projects a formal, commercial role. Visit the car dealer for the latest models. Pro Tip 3/3Variety of Goods Can be used for diverse goods, from furniture and cars to stamps and books. The stamp dealer had a rare 1840 Penny Black.