Conjunction

Conjunctions are words that join clauses together to make sentences and show how the meanings of the clauses, words, or phrases relate to each other.

-some examples of conjunctions are: AND, BUT, OR, SO

-example sentence with a conjunction: "My mom loves to cook, but hates to clean up."

Source: (http://www.gsu.edu/~wwwesl/egw/bryson.htm )