a.

1. 较小的，较少的
   He left most of his money to his sons; his daughter only received a minor share of his wealth.

   他把大部分钱留给了儿子；他女儿只得到他财产的一小部分。

2. 不重要的，次要的
   She played a minor role in the opera.

   她在那出歌剧里扮演了一个小角色。

3. （疾病，手术等）不严重的，无生命危险的
   He is going in for a minor operation.

   他要接受一个小手术。

4. 【英】（置于姓名后）（兄弟或学校同姓者中）年幼的
   He was called Smith Minor to distinguish him from the other Smiths.

   人们称他小史密斯，以便与其他叫史密斯的人相区别。

5. 未成年的
6. 【主美】（大学学科）副修的
   Computer Science is his minor subject.

   计算机是他的副修科目。

7. 【音】小调的，小音阶的

n.[C]

1. 未成年人
   You can't serve drinks to minors.

   你不能把酒卖给未成年人。

2. 【主美】副修科目，副修科学生
   English is his major and history is his minor.

   他主修英文，副修历史。

3. 【音】小调，小音阶

vi.

1. 【主美】副修，兼修[（+in）]
   She majored in English and minored in education.

   她主修英文，副修教育。

   He will minor in French.

   他将副修法文。

adj.

1. having little importance, seriousness, or significance.
2. Music  (of a scale) having intervals of a semitone between the second and third degrees, and (usually) the fifth and sixth, and the seventh and eighth. Contrasted with major.
   ▸(of an interval) characteristic of a minor scale and less by a semitone than the equivalent major interval.
   ▸ [often postpos.] (of a key or mode) based on a minor scale:

   Concerto in A minor.
3. Brit. dated (appended to a surname in public schools) indicating the younger of two brothers:
   Smith minor.
4. Logic  (of a term) occurring as the subject of the conclusion of a categorical syllogism.
   ▸(of a premise) containing the minor term in a categorical syllogism.

n.

1. a person under the age of full legal responsibility.
2. Music  a minor key, interval, or scale.
   ▸Bell-ringing  a system of change-ringing using six bells.
3. (minors) N. Amer. the minor leagues in baseball or American football.
4. N. Amer. a student's subsidiary subject or course.
5. Logic  a minor term or premise.
6. a small drab moth which has purplish caterpillars that feed on grass. [Genus Oligia.]

v.