B2 high or higher in rank级别高的
older and more experienced than the other members of a team比其他成员年长的；比其他成员更有经验的
a senior government aide
Two senior officials have been entrusted with organizing the auction.
The president was flanked by senior ministers.
Criticism has been levelled at senior figures in the industry.
She's just been promoted to senior sales rep.
B2 [ before noun ] older年龄大一些的
UK written abbreviation Snr, US written abbreviation Sr. used after a man's name to refer to the older of two people in the same family who have the same name（置于姓名后，表示同一家人中同名的两人中的年长者）老，大
This is the common room for senior pupils at the school.
I'm hoping to speak to Al Jackson, senior.
[ C ] someone who is high or higher in rank上级；上司
20, 30, etc. years older than someone比…年长20／30岁等的
[ C ] US UK senior citizen an old person年纪大的人
[ C ] US a student in their final year of high school or university（中学或大学的）毕业班学生