1 of a game
ADJ. accomplished, brilliant, dangerous, excellent, exciting, fine, gifted, good, great, outstanding, strong, talented, top, world-class one of the country's top tennis players | star The club were forced to sell their star player. | poor He's a poor player, but he tries very hard. | average These boots are for the professional rather than for the average player. | experienced | aggressive | attacking, midfield (both in football) | handicap, scratch (both in golf) | basketball, bridge, chess, rugby, snooker, tennis, etc.
2 of a musical instrument
ADJ. accomplished, gifted, great, outstanding, talented | bass, horn, keyboard, sax, etc.
3 in business
ADJ. key, leading, major
PREP. ~ in Their firm is a major player in the London property market.