junior

Junior is a description for a son with the exact same name as his father, or a person of lower status.

(adjective)

An example of junior used to describe someone is name of a man named Edward James Finch Jr. whose father is also named Edward James Finch.
An example of junior used as an adjective is in the phrase "junior secretary," which means a secretary who works for a senior secretary.

The definition of a junior is a person of younger age or status, or a person in his or her third year of college or high school.

(noun)

An example of a junior is a 15 year old as compared to a 60 year old.
An example of a junior is a person who will be a senior in high school next year.

See junior in Webster's New World College Dictionary

adjective

the younger: written Jr. after the name of a son who bears exactly the same name as his father
of more recent position or lower status: a junior partner, a junior lien
of later date
made up of younger members
☆ of or for juniors in a high school or college

Origin: L, contr. of juvenior, compar. of juvenis, young

noun

a younger person
a person of lower standing or rank
☆ a student in the next-to-last year of college or the eleventh grade in high school
☆ a size of clothing for slight women and girls with high waistlines

See junior in American Heritage Dictionary 4

adjective

Abbr. Jr. Used to distinguish a son from his father when they have the same given name.
Intended for or including youthful persons: a junior sports league.
Lower in rank or shorter in length of tenure: a junior officer; the junior senator.
Of, for, or constituting students in the third year of a U.S. high school or college: the junior class.
Lesser in scale than the usual.

noun