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English definition of “senior”

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senior

adjective  /ˈsin·jər/ us  

senior adjective (MORE ADVANCED)

more advanced, or higher in rank: Senior officials denied that a problem exists.

senior adjective (OLDER)

older: The senior Griffey played on the same baseball team as his son, Ken Griffey, Jr.

senior adjective (OF SCHOOL)

[not gradable] relating to the fourth and final year of college or high school: Alanna’s in her senior year of high school.

senior

noun  /ˈsin·jər/ us  

senior noun (SCHOOL)

[C] a student in the fourth and final year of a program of study in a college, university, or high school (= a school for students 15 to 18 years old)

senior noun (OLDER PERSON)

[U] a person who is older than another person: She married a man almost 40 years her senior (= almost 40 years older).
(Definition of senior from the Cambridge Academic Content Dictionary © Cambridge University Press)
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