[] the fact of being older or of a higher rank than others年长；级别高◆a position of seniority高级职位the rank that you have in a company because of the length of time you have worked there资历◆a lawyer with five years' seniority拥有五年从业资历的律师◆Should promotion be based on merit or seniority?晋升应该看业绩，还是看资历？