1. When major is an adjective, major means major, major and so on.

When major is used as a noun, major means adult, major and army major.

3.major is an intransitive verb when it means verb, and major means significant.

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Main meaning:

More; Major; Serious; Music major.

Adults; Major in (a subject); Major of the army; An important person.

Major in.

Fixed collocation:

Big problem, big problem.

The main reason is the main reason.