[op.er.a.tion.al] adj (ca. 1909) 1: of or relating to operation or to an operation "the ~ gap between planning and production"
2: of, relating to, or based on operations 3 a: of, engaged in, or connected with execution of military or naval operations in campaign or battle b: ready for or in condition to undertake a destined function -- op.er.a.tion.al.ly adv