A Greek word that is the technical term in the N.T. for the second coming of the Lord in glory to judge the world (see Matt. 24: 3, 27, 39; 1 Cor. 15: 23; 1 Thes. 2: 19; 1 Thes. 3: 13; 1 Thes. 4: 15; 1 Thes. 5: 23; 2 Thes. 2: 1,8; 2 Pet. 1: 16; 3: 4).