Dr. Michael LeFebvre via Gentle Reformation:
As defined in the dictionary, to curse is “to wish or invoke evil, calamity, injury, or destruction upon.” In modern American society, cursing is typically done through one-word invectives: the so-called “four letter words.” When done properly—and there is a right use of cursing—a curse is a call upon God to visit his just condemnation on someone or something. For example, in Genesis 9:25, Noah uttered a curse upon the house of Ham due to the evil Ham himself had brought upon his lineage. A curse is a declaration that someone or something is condemned before God. We don’t have the right to decide for ourselves who is condemned and who is not; but there are times when God’s condemnation is to be declared—in all reverence and warning—in a holy curse.