senior

(noun) an undergraduate student during the year preceding graduation.

(noun) a person who is older than you are. Synonyms: elder.

(adj) older; higher in rank; longer in length of tenure or service. Synonyms: senior (vs. junior). Examples: "Senior officer."

(adj) used of the fourth and final year in United States high school or college. Synonyms: senior(prenominal), fourth-year. Examples: "The senior prom."

(adj) advanced in years; (`aged' is pronounced as two syllables). Synonyms: aged, elderly, older. Examples: "Aged members of the society." "Elderly residents could remember the construction of the first skyscraper." "Senior citizen."