Vise/vaɪs/ Definition 1 of 2Pro Tip 1/3Workshop Essential Used in professions requiring precision to hold items securely. The jeweler used the vise to carefully polish the ring. Pro Tip 2/3Adjustable Pressure A vise can apply various amounts of pressure; not always to the maximum. He adjusted the vise gently to not damage the delicate electronics. Pro Tip 3/3Two Main Parts Consists of two parallel jaws, one fixed and one movable. Align your material between the vise's jaws before tightening.