market leadernoun [ C ]
ukusCOMMERCEthe company that sells most of a product or service in a particular market:
market leader for/in sth The supermarket chain is now the market leader in baby goods.
His aim is to become the market leader in providing desktop solutions to doctors and the wider health care community.
the global/world market leader The group is the world market leader in car electronics.
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market challenger
market follower
market nicher