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.

To work in a junior role (on something).

To have juniors (more advanced students) assist in instructing (beginners).

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

junior

junior (all senses)

junior

junior (having a subordinate role, job, or situation)

junior (belonging to a younger person, or an earlier time of life)

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