If you are someone's junior, you are younger than they are.
较年幼者 • She now lives with actor Denis Lawson, 10 years her junior. 她现在和比她小10岁的演员丹尼斯·劳森同居。
Junior members of the team often take on supportive roles.
团队中的初级成员通常承担辅助性工作。
I completed my junior year in Spain.
我在西班牙完成了我的三年级学业。