se·nior·i·ty 
/sinˈjorəti/ noun
/sinˈjorəti/ noun [noncount] 1 : the amount of time you have worked at a job or for a company compared to other employees
▪ Promotions are based on merit and seniority. ▪ a teacher with less/more seniority ▪ He has worked here longer than I have, so he has seniority over me. 2 : the state of having a higher rank than another person
▪ a position of seniority
▪ Promotions are based on merit and seniority. ▪ a teacher with less/more seniority ▪ He has worked here longer than I have, so he has seniority over me.
▪ a position of seniority
