Dicker/ˈdɪkər/ Definition 1 of 3Pro Tip 1/3Informal Tone Used in casual settings, 'dicker' feels less formal than 'negotiate'. Let's dicker with the vendor at the flea market. Pro Tip 2/3Lengthy Process 'Dicker' often implies a back-and-forth that takes some time. They dickered over the contract terms for weeks. Pro Tip 3/3Personal Interaction Implies direct communication between people, typically face-to-face. She dickered with the artist to lower the painting's price.