What is the meaning of extremity?

noun

• An external body part that projects from the body.
  • usage: "it is important to keep the extremities warm"
  • synonyms: appendage, member
• An extreme condition or state (especially of adversity or disease. )
• The greatest or utmost degree.
  • usage: "the extremity of despair"
• The outermost or farthest region or point.
• That part of a limb that is farthest from the torso. .