UNILATERAL

adj. 1 performed by or affecting only one person or party (unilateral disarmament; unilateral declaration of independence). 2 one-sided. 3 (of the parking of vehicles) restricted to one side of the street. 4 (of leaves) all on the same side of the stem. 5 (of a line of descent) through ancestors of one sex only. unilaterally adv.