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senior

adjective (OLDER)
 
 
/ˈsiː.ni.ər/ US  /-njɚ/

Definition

B2 [before noun] older: Senior pupils are expected to set an example to the younger children. → Compare junior nounDescribing age and birthdays (UK written abbreviation Snr, US written abbreviation Sr.) used after a man's name to refer to the older of two people 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 (OLDER) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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