Junior  —adj. 1 (often foll. By to) inferior in age, standing, or position. 2 the younger (esp. Appended to the name of a son for distinction from his father). 3 of the lower or lowest position (junior partner). 4  (of a school) for younger pupils, usu. Aged 7–11. —n. 1 junior person. 2 person at the lowest level (in an office etc.). [latin, comparative of juvenis young]