a.

1. （數量大小稱度等）較大的；較多的；較大範圍的
   The major part of the audience was laughing.

   大部分觀眾在笑。

   The house needs major repairs.

   這幢房子需要大修。

2. 主要的，重要的；一流的[B]
   He is a major writer.

   他是位大作家。

3. 主修的[B]
   Her major subject is chemistry.

   她的主修科目是化學。

4. 成年的，達到法定年齡的
5. 【音】大調的，大音階的
6. 【邏】大前提的

n.[C]

1. 成年人，已到法定年齡者
2. 重要人物；才能卓越者，地位優越者
   Minor poets are legion; the majors are few and far between.

   二三流的詩人不計其數；大詩人則寥寥無幾，多少年才出一個。

3. （常大寫）（英國）陸軍（或海軍陸戰隊）少校；（美國）陸軍（或空軍、海軍陸戰隊）少校
4. [主美]（大學中的）主修科目
   His major is chemistry.

   他的主修科目是化學。

   Physics was his major.

   物理是他的主修科目。

5. [主美]（大學專業的）主修學生
   Are most of you English majors?

   你們大多數都是英語主修生嗎？

   He is a mathematics major.

   他是主修數學的學生。

6. 【音】大調，大音階；大音程；大三和弦
   the scale of C major

   C大調音階

7. 【邏】大前提；大項
8. 主要公司（組織、企業……等）
   MGM, Paramount, and Columbia are all majors in film industry.

   米高梅、派拉蒙和哥倫比亞都是電影業的大公司。

vi.

1. [主美] 主修 [（+in）]
   What do you plan to major in?

   你準備主修什麼科？

   Alice majors in economics.

   愛麗絲主修經濟學。

adj.

1. important, serious, or significant.
   ▸greater or more important; main.
2. Music  (of a scale) having intervals of a semitone between the third and fourth, and seventh and eighth degrees. Contrasted with minor.
   ▸(of an interval) equivalent to that between the tonic and another note of a major scale, and greater by a semitone than the corresponding minor interval.
   ▸ [postpos.] (of a key) based on a major scale:

   Prelude in G Major.
3. Brit. dated (appended to a surname in public schools) indicating the elder of two brothers:
   Smith major.
4. Logic  (of a term) occurring as the predicate in the conclusion of a categorical syllogism.
   ▸(of a premise) containing the major term in a categorical syllogism.

n.

1. a rank of officer in the army and the US air force, above captain and below lieutenant colonel.
   ▸an officer in charge of a section of band instruments:

   a trumpet major.
2. Music  a major key, interval, or scale.
3. a major organization or competition.
4. N. Amer. a student's principal subject or course.
   ▸a student specializing in a specified subject:

   a math major.
5. Logic  a major term or premise.
6. Bell-ringing  a system of change-ringing using eight bells.
7. Australian Rules  a goal.

v.