adj (1)地(职)位较低的，资历较浅的(of lower rank or authority)[A(to)]：a～clerk/officer/minister 小职员/下级军官/资历较浅的部长;a～member of the committee 委员会中资历较浅的成员;a～senator from New York 来自纽约的资历不深的参议员;In the army a captain is～to a major. 在部队上尉是少校的下级。Academically he was～to Martin. 学术上他不如马丁。〖同〗lesser，lower，secondary，inferior;〖反〗senior，superior;

(2)(用于姓名后表示同名父子中的子或同性两人中的)较年幼的，小(term used with the name of a son named after his father or the younger of two boys having the same name in a school，university，etc)(略作 Jnr，Jr，Jun)：Mr Smith J～小史密斯先生; John Smith J～is the son of John Smith. 小约翰·史密斯是约翰·史密斯的儿子。

(3)较年幼的(of or for younger)[A(to)]：sb's～brother 某人的弟弟;～dress sizes 青少年穿的衣服尺码;the～skating championship 少年滑冰冠军;～school 小学; He is～to me by several years/He is several years～to me. 他比我年轻几岁。〖同〗younger，minor;〖反〗elder，older;

n (1)地(职)位较低者，资历较浅者(person who is newer or of lower rank in an office，profession，etc)[C]：an office～办公室的低级职(官)员;Of the two officers，James is the～. 两位官员中，詹姆斯是下级。A captain is a major's～.上尉是少校的下级。

(2)较年(幼)轻者(person who is younger than another used with his，her，your，etc)[C，常sing]：Tom is his brother's～by three years. 汤姆比他哥哥小三岁。

(3)三年级学生(student in his third year at college or high school)[C](AmE);

(4)小学生(pupil at a junior school)[C](BrE);

(5)小儿子，小子(name for sb's son in a family)[C](AmE，infml)：Come here，J～!儿子，过来!