1ju·nior 
/ˈʤu:njɚ/ adjective
/ˈʤu:njɚ/ adjective 1 not used before a noun, US a : younger in age
▪ He is six years junior to me. = He is junior to me by six years. [=he is six years younger than I am]
b — used chiefly in its abbreviated form Jr. to identify a son who has the same name as his father ▪ John Smith Jr. and John Smith Sr. — compare senior 2 always used before a noun : lower in standing or rank
▪ She is a junior partner in the law firm. ▪ a junior army officer — compare senior 3 always used before a noun : designed for or done by young people
▪ junior hockey/tennis
▪ He is six years junior to me. = He is junior to me by six years. [=he is six years younger than I am]
b — used chiefly in its abbreviated form Jr. to identify a son who has the same name as his father ▪ John Smith Jr. and John Smith Sr. — compare senior
▪ She is a junior partner in the law firm. ▪ a junior army officer — compare senior
▪ junior hockey/tennis
