What is the meaning of conjunction?

Conjunction means combining, joining. In astronomy, it means the apparent closeness of two objects in the sky, In grammar, conjunctions are words used to connect words or clauses.

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Conjunctions are sometimes called joining words. They are a class of words used to connect clauses or sentences or to coordinate words in the same clause (e.g. and, if).

I can't see you tonight because I am going to be busy.

Another meaning of the word is, if one thing is done or used in conjunction with another, the two things are done or used together.

The worksheets are designed to be used in conjunction with the new student course books.