Definitions
1.nounAn old person.
2.nounSomeone older than someone else (with possessive)."He was four years her senior."
3.nounSomeone seen as deserving respect or reverence because of their age.
4.nounAn elder or presbyter in the early Church.
5.nounSomebody who is higher in rank, dignity, or office.
6.nounA final-year student at a high school or university.
7.adjectiveOlder; superior"senior citizen"
8.adjectiveHigher in rank, dignity, or office."senior member; senior counsel"
9.adjectiveOf or pertaining to a student's final academic year at a high school (twelfth grade) or university.