Sever/ˈsevər/ Definition 1 of 2Pro Tip 1/3Physical Separation Use 'sever' to describe physically cutting off parts like limbs, connections, or materials. The accident severed the power lines. Pro Tip 2/3Irreversible Action 'Sever' often implies that the separation is permanent and cannot be easily repaired. The sculpture fell and sever the arm from the statue. Pro Tip 3/3Suddenness The action of severing is usually sudden and decisive, not gradual. The tree branch was severed by a single strike of lightning.