junior

adjective

• 1of, for, or denoting young or younger people:junior tennis
• of or for students in the third year of a course lasting four years in college or high school:his junior year in college
• (often Junior) [postpositivein names] denoting the younger of two who have the same name in a family, especially a son as distinct from his father:John F. Kennedy Junior
• British of, for, or denoting schoolchildren between the ages of 7 and 11.

• 2low or lower in rank or status:Virginia’s junior senator part of my function is to supervise those junior to me

noun

• 1a person who is a specified number of years younger than someone else:he’s five years her junior
• a student in the third year of college or high school.
• (in sports) a young competitor, typically under sixteen or eighteen.
• informal used as a nickname or form of address for one’s son.

• 2a person with low rank or status compared with others.

• 3a size of clothing for teenagers or slender women.