答： 这是较为时髦的新词，泛指各行业的领袖，领跑者，顶级选手，行为主导者。
1）在制造行业指：（行业）领跑者，（行业）领袖，一般对行业产品有定价权或控制权，如Microsoft。如：Actavis Group is one of the world's leading players in first-class generic pharmaceuticals
2）在体育界指：顶级选手，在集体比赛中往往能掌控局面者（在各项目上，一般在世界排名表上位置居前的少数选手，如科比）Mr Zhang will lead the local challenge at Sheshan against some of the leading players in world golf.
3）在文艺界指：艺术大家《Passing performances :queer readings of leading players in American theater history》
4）在法律上指：行为主导者（人）：Resources Basis, Assumption of Leading Players of Enterprises & Corporations' Infringement of copyright
5）在IT界：除上述一般意义外，还特指播放器，leading media players技术领先的媒体播放器


仅供参考