n. pl. ex·trem·i·ties 1. The outermost or farthest point or portion: at the extremity of the peninsula.
2. The greatest or utmost degree: the extremity of despair.
3. Grave danger, necessity, or distress: people in extremity.
4. An extreme or severe measure: had to resort to extremities in the crisis.
5. a. A bodily limb: She is in a wheelchair because of weakness of the lower extremities.
b. extremities The hands and feet: Frostbite affects the extremities first.