adj (1)较小(少、轻、次要)的(lesser or smaller in size，amount，number，importance， etc)[通常作attrib]：a～fracture/injury/illness/operation 轻(微)骨折/伤势不重/小病/小手术;a～fault/skirmish/disturbance/offence小错误/小战斗/小骚动/轻罪;a～essayist/artist/composer/poet不重要的散文家/艺术家/作曲家/诗人;～roads/parts/changes/roles/planets小路/部分/变动/角色/行星;The car needs a few～repairs.汽车只需几处小修。There have only been～improvements in his work.他的工作只有一点点小改进。〖同〗insignificant，slight，unimportant;〖反〗major，important，significant;

(2)年幼的，小的(designating the junior or younger of two pupils with the same surname in the same school)(旧用法);Smith～小史密斯;

(3)小调(音阶)的(smaller by a half note than the corresponding major interval)：a～third/sixth小三度/六度(音);a symphony in C～C小调交响曲;in the key of B～用B小调的调子;She played the piano concerto in D～. 她演奏D小调钢琴协奏曲。

n (1)未成人(person who has not yet reached a legal age)[C]：They can't serve drinks to～s.他们不能给未成年人酒喝。Do they send～s to prison?他们监禁未成年人吗?〖同〗child，youngster，teenager，youth;〖反〗adult，elder，grown up;

(2)副科(secondary area of academic study)：French is his～.法语是他的副科。Her～subjects are plant ecology and entomology.她选修植物生态学和昆虫学。〖反〗major;

vi 副修(某科目)(study a subject in a minor field)[I+prep(in)]：～in history/Greek literature/microbiology选修历史/希腊文学/微生物学;

【注意】minor词性为adj时，其后不可用than。