WINNING [no plural] › a winning position during a race or other situation where people are competing: She's in the lead (= winning). France has just taken the lead (= started to win). a three-goal lead FILM/PLAY [C] › the main person in a film or play: She plays the lead in both films. DOG [C] UK (US leash) › a chain or piece of leather fixed to a dog's collar so that it can be controlled: Dogs must be kept on a lead at all times. ELECTRICITY [C] UK (US cord) › the wire that connects a piece of electrical equipment to the electricity supply INFORMATION [C] › information about a crime that police are trying to solve: Police are chasing up a new lead.