What is the meaning of Junior?

Low in rank; having a subordinate role, job, or situation.

Younger.

Belonging to a younger person, or an earlier time of life.

Of or pertaining to a third academic year in a four-year high school (eleventh grade) or university.

A younger person.

A name suffix used after a son's name when his father has the same name (abbreviations: Jnr., Jr., Jun.).

A clothing size for girls or women.

A third-year student at a high school or university.

A junior barrister.

junior (younger or lower-ranked person, for example in job titles)

junior

junior (all senses)

junior

young

junior.

comparative degree of juvenis

junior (youngest member of the family by age)

junior (athlete who is under the age recommended for a sport, usually nineteen years of age)

Jr. (title used after a son's name when his father has the same name)

junior

junior

Source: wiktionary.org