From Longman Dictionary of Contemporary Englishseniorityse‧ni‧or‧i‧ty /ˌsiːniˈɒrəti $ -ˈɔː-, -ˈɑː-/ noun [uncountable] 1 HIGH POSITION OR RANKif you have seniority in a company or organization, you have worked there a long time and have some official advantages I had 15 years seniority, and they couldn’t fire me.2 HIGH POSITION OR RANKwhen you are older or higher in rank than someone else a position of seniority
Examples from the Corpus
seniority• There is no substitute for seniority and experience.• Bonuses are linked to productivity at Sofmap, and promotion is purely by merit, not seniority.• People should be promoted and rewarded on merit, not seniority.• In spite of his breakdowns, Hoccleve achieved a position of seniority and in due course retired with a pension.• In general, the higher the employee's seniority, the greater the willingness to move.• The fourteen Area Board chairmen were men of some seniority and experience.• At least we would be out of the rat race until I had worked up some seniority in my job.• He circumvented the seniority system, handpicking some of the most important chairmen.• Even if they return to work for the same firm when their children go to school their seniority is lost.• Today, seniority and loyalty mean nothing in the workplace.had ... seniority• But with nine years of service Gary had just enough seniority to hang on.From Longman Business Dictionaryseniorityse‧ni‧or‧i‧ty /ˌsiːniˈɒrəti-ˈɔː-, -ˈɑː-/ noun [uncountable]1the fact of being older or higher in rank than someone elseChief judges are chosen by seniority.2HUMAN RESOURCESthe official advantage someone has because they have worked for an organization for a long timeWorkers with longer seniority get up to three years of benefits.3FINANCE the situation in which particular loans etc are paid before other loans etc if a company is in financial difficultyPrivileged creditors insisted on the seniority of their loans. 