n. The act of refusing; denial or rejection of anything demanded, solicited, or offered for acceptance.n. The choice of refusing or taking; the right of taking in preference to others; option of buying; preëmption.n. In hydraulic engineering, the resistance of a pile at any point to further driving.n. In mech., the limiting resistance of a female screw or nut to further turning upon the male screw or bolt, and conversely.