指防卫行为与侵害行为不相适应，造成超过必要限度的损害disproportionate defence(Britain); disproportionate defense(US)

• 小明在小偷失去侵害能力和反抗能力后，用刀刺伤小偷，属防卫过当。

  Xiao Ming stabbed the thief after they had lost the ability to harm and fight back. This is disproportionate defence.

• 防卫过当应承担刑事责任。

  Criminal liability should be borne for disproportionate defence.