"But the people refused to listen to the voice of Samuel; they said, 'No! but we are determined to have a king over us, so that we also may be like other nations, and that our king may govern us and go out before us and fight our battles." 1Samuel 8:19-20
King, by definition is a male ruler over a country who rules for life. At times the term 'king' may be used as 'lord' or 'god'.