a person who becomes a member of a group or organization

new entrants to the school/company 学校新生／公司新职员

a person who takes part in a competition or an exam

All entrants complete two three-hour papers. 所有的考生都要完成两场历时3小时的笔试。

a company that starts selling a particular product or service, or selling in a particular place, for the first time

As a recent entrant to the Japanese market, the company is at a disadvantage compared to Japanese suppliers. 因为是首次登陆日本市场，这家公司跟日本供应商相比处于劣势。