On the contrary; on the other hand; only; yet; still; however; nevertheless; more; further; -- as connective of sentences or clauses of a sentence, in a sense more or less exceptive or adversative; as, the House of Representatives passed the bill, but the Senate dissented; our wants are many, but quite of another kind.
But is a common conjunction in English used between two or more clauses, which often implies the immediately following clause will be the limit, difference, or focal point of the original clauses.