Definitions from Wiktionary (Senior)

▸ adjective:  Older.
▸ adjective:  Higher in rank, dignity, or office; superior.
▸ adjective:  (US) Of or pertaining to a student's final academic year at a high school (twelfth grade) or university.
▸ noun:  (now chiefly US) An old person.
▸ noun:  Someone older than someone else (with possessive).
▸ noun:  Someone seen as deserving respect or reverence because of their age.
▸ noun:  (obsolete, biblical) An elder or presbyter in the early Church.
▸ noun:  Somebody who is higher in rank, dignity, or office.
▸ noun:  (US, Philippines) A final-year student at a high school or university; a finalist.
▸ noun:  A surname.
▸ Also see senior

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