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English definition of “senior”

senior

adjective     /ˈsiːniər/
MORE IMPORTANT B2 having a more important job or position than someone else: a senior executive We work in the same team but she's senior to me.Position and status in groups and organizations
OLDER older: senior studentsDescribing age and birthdays
NAME (written abbreviation Sr) mainly US used at the end of a man's name to show that he is the older of two men in the same family who have the same name: Hello, may I speak to Ken Griffey, Senior, please?Names and titles
(Definition of senior adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

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