Definition: a person who is older than you are
Main entry: senior
Definition: an undergraduate student during the year preceding graduation
Main entry: fourth-year, senior
Definition: used of the fourth and final year in United States high school or college
Usage: the senior prom
Main entry: older, senior, aged, elderly
Definition: advanced in years; (`aged' is pronounced as two syllables)
Usage: aged members of the society; elderly residents could remember the construction of the first skyscraper; senior citizen
Main entry: senior
Definition: older; higher in rank; longer in length of tenure or service
Usage: senior officer