a person who is younger than another
is three years my junior
a person holding a lower or subordinate rank
a member of a junior younger form in a school, sports team, etc
in England and Australia, a barrister who is not a Queen's Counsel, esp one who is assisting a senior barrister in the conduct of a case
NAmer a student in the penultimate year before graduating
NAmer, informal a male child; a son
[Latin junior: see junior2]