Definitions
1.nounA younger person."four years his junior"
2.nounA name suffix used after a son's name when his father has the same name (abbreviations: Jnr., Jr., Jun.).
3.nounA third-year student at a high school or university.
4.nounA junior barrister.
5.adjectiveLow in rank; having a subordinate role, job, or situation.
6.adjective(often preceded by a possessive adjective or a possessive form of a noun) Younger.
7.adjectiveBelonging to a younger person, or an earlier time of life.
8.adjectiveOf or pertaining to a third academic year in a four-year high school (eleventh grade) or university.