a.

1. 年紀較輕的[（+to）]
   He is junior to me by two years.

   他比我小兩歲。

2. 資淺的；地位較低的；晚輩的[（+to）]
   My cousin is a junior officer.

   我表弟是個下級軍官。

3. 【美】（四年制大學或中學中）三年級（生）的
4. （置於姓名後表示同名父子中的子或同姓兩人中的較年幼者，略作Jr.或jr.）小
   Mr. Smith Junior is in charge of this department.

   小史密斯先生負責這個部門的工作。

n.

1. 較年少者
   I am three years her junior.

   我比她小三歲。

2. 等級較低者；晚輩
   Of the two clerks, he is the junior.

   這兩個職員中他職務較低。

3. 三年級生
4. 【美】【口】兒子；小伙子

adj.

1. for or denoting young or younger people.
   ▸Brit. for or denoting schoolchildren aged 7–11.
   ▸N. Amer. of or for students in the third year of a four-year course at college or high school.
2. [postpos.] denoting the younger of two with the same name in a family.
3. low or lower in rank or status.

n.

1. a person who is a specified amount younger than someone else:
   he's five years her junior.
2. Brit. a child at a junior school.
   ▸N. Amer. a student in the third year at college or high school.
   ▸(in sport) a young competitor, typically under 16 or 18.
   ▸N. Amer. informal a nickname for one's young son.
3. a person of low rank or status.