junior

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Used to distinguish a son from his father when they have the same given name.
2. adj. Intended for or including youthful persons: a junior sports league.
3. adj. Lower in rank or shorter in length of tenure: a junior officer; the junior senator.
4. adj. Of, for, or constituting students in the third year of a U.S. high school or college: the junior class.
5. adj. Lesser in scale than the usual.
6. n. A person who is younger than another: a sister four years my junior.
7. n. A person lesser in rank or time of participation or service; subordinate.
8. n. A student in the third year of a U.S. high school or college.
9. n. A class of clothing sizes for girls and slender women. Also called junior miss.

Century Dictionary and Cyclopedia

1. Younger; not as old as another. It is applied to distinguish the younger of two persons bearing the same name in one family or town, and especially to distinguish a son bearing the same name as the father: opposed to senior: as, John Smith, junior. In this use commonly abbreviated Jr. or Jun.
2. Younger or lower in standing, as in a profession, especially the bar: as, a junior counsel; a junior partner in a firm or company.
3. In American colleges and schools, pertaining to the third year of the course, the next below the senior or last year; in institutions having a three years' course, usually pertaining to the first year (the second being called the middle year): as, the junior class; junior students.
4. n. A person younger than another.
5. n. One of less experience or inferior standing in his profession than another, who is called his senior; one employed as the subordinate of another, especially at the bar.
6. n. In American colleges and seminaries, a member of the junior class; a student in the junior year.

Wiktionary

1. adj. not comparable Younger.
2. adj. not comparable Of or pertaining to a third academic year in a four-year high school (eleventh grade) or university.
3. adj. comparable Low in rank; having a subordinate role, job, or situation.
4. n. A younger person.
5. n. A third-year student at a high school or university.
6. n. A name suffix used after a son's name when his father has the same name. Abbreviation: Jr.

GNU Webster's 1913

1. adj. Less advanced in age than another; younger. Abbreviated Jr.
2. adj. Lower in standing or in rank, or having entered later into a position or office
3. adj. Composed of juniors, whether younger or a lower standing; ; of or pertaining to juniors or to a junior class. See Junior, n., 2.
4. adj. Belonging to a younger person, or an earlier time of life.
5. adj. of or relating to the third year of a four-year term; -- used of the third or next to final year in a U. S. high school or college. See junior{2}, n..
6. n. A younger person.
7. n. One of a lower or later standing; specifically, in American colleges and four-year high schools, one in the third year of his course, one in the fourth or final year being designated a senior; in some seminaries, one in the first year, in others, one in the second year, of a three years' course.

WordNet 3.0

1. adj. younger; lower in rank; shorter in length of tenure or service
2. adj. used of the third or next to final year in United States high school or college
3. n. a son who has the same first name as his father
4. n. a third-year undergraduate
5. n. term of address for a disrespectful and annoying male
6. adj. including or intended for youthful persons
7. n. the younger of two persons