The Collaborative International Dictionary of English v.0.48:

Extremity \Ex*trem"i*ty\, n.; pl. Extremities. [L. extremitas:
   cf. F. extr['e]mit['e].]
   1. The extreme part; the utmost limit; the farthest or
      remotest point or part; as, the extremities of a country.
      [1913 Webster]

            They sent fleets . . . to the extremities of
            Ethiopia.                             --Arbuthnot.
      [1913 Webster]

   2. (Zo["o]l.) One of locomotive appendages of an animal; a
      limb; a leg or an arm of man.
      [1913 Webster]

   3. The utmost point; highest degree; most aggravated or
      intense form. "The extremity of bodily pain." --Ray.
      [1913 Webster]

   4. The highest degree of inconvenience, pain, or suffering;
      greatest need or peril; extreme need; necessity.
      [1913 Webster]

            Divers evils and extremities that follow upon such a
            compulsion shall here be set in view. --Milton.
      [1913 Webster]

            Upon mere extremity he summoned this last
            Parliament.                           --Milton.

   Syn: Verge; border; extreme; end; termination.
        [1913 Webster]