What is Seniority ?

Seniority is (noun) 1. the fact of being older or more important the profes- sors were listed in order of seniority the professor who had been in the department the longest was put at the top of the list 2. the fact of being a member of a group longer than someone else He has several years’ seniority over me as a member of the club.


source: Easier English, Student Dictionary Upper Intermediate Level