To hamstring, i.e., sever the "tendon of Achilles" of the hinder legs of captured horses (Joshua 11:6; 2 Samuel 8:4; 1 Chronicles 18:4), so as to render them useless.

Noah Webster's New International Dictionary of the English Language

1. (n.) The joint in the hind limb of quadrupeds between the leg and shank, or tibia and tarsus, and corresponding to the ankle in man.

2. (n.) A piece cut by butchers, esp. in pork, from either the front or hind leg, just above the foot.

3. (n.) The popliteal space; the ham.

4. (n.) Same as Hock, a joint.

5. (v. t.) Same as Hock, to hamstring.

6. (n.) An adz; a hoe.

7. (v. t.) To cut with a hoe.