Definitions for "Market leader"
Seller of the product or service with the largest market share in its industry.
the company with the largest market share.
A company that has achieved a dominant position, either in scale (e.g., British Airways) or influence (e.g., Virgin) within its field. This leading position often comes about because the company was the first to market a certain type of product and, with the protection of a patent, has managed to consolidate its position before direct competition was possible. Alternatively, a company may overtake a previous market leader through greater efficiency and skilful positioning.
The store that controls the market share of merchandise or services.