This is a man who may be a lawyer, a judge, a general, or a governor. He gives wise counsel, is firm in enmity as well as in friendship. A man of many ideas, thoughts, and designs.
The card may also mean power, strength, authority, or military intelligence. A lawsuit is in the offing.
Arthur E. Waite - The Pictorial Key to the Tarot :
He sits in judgment, holding the unsheathed sign of his suit. He recalls, of course, the conventional Symbol of justice in the Trumps Major, and he may represent this virtue, but he is rather the power of life and death, in virtue of his office.
King of Swords card divinatory meanings:
Whatsoever arises out of the idea of judgment and all its connexions-power, command, authority, militant intelligence, law, offices of the crown, and so forth.