senior

definition: used of the fourth and final year in United States high school or college
example:
speech part: adjective
synonyms: fourth-year
definition: advanced in years
example:
speech part: adjective
synonyms: older
definition: older
example:
speech part: adjective
synonyms:
definition: a person who is older than you are
example:
speech part: noun
synonyms: elder
definition: an undergraduate student during the year preceding graduation
example:
speech part: noun
synonyms:

senior is explained and pronounced

How senior is being used?