What is a conjunction?

conjunction (noun): a part-of-speech that joins together words, phrases and clauses

A conjunction is one of the 9 parts of speech.

A conjunction is a word that connects two parts of a sentence. The very common word and is a conjunction. Look at how it joins these words, phrases and clauses:

Here are some other common conjunctions:

And here are some more example sentences:

Conjunction form
There is no special form for conjunctions. Many are short, simple words (but, for, since); and others are two or three words (so that, in order that, as long as).

The number of conjunctions in a text is one of the factors used in assessing its complexity.