The Collaborative International Dictionary of English v.0.48:

Strangulation \Stran"gu*la`tion\, n. [L. strangulatio: cf. F.
   strangulation. See Strangle.]
   1. The act of strangling, or the state of being strangled.
      [1913 Webster]

   2. (Med.) Inordinate compression or constriction of a tube or
      part, as of the throat; especially, such as causes a
      suspension of breathing, of the passage of contents, or of
      the circulation, as in cases of hernia.
      [1913 Webster]

WordNet (r) 3.0 (2006):

strangulation
    n 1: the act of suffocating (someone) by constricting the
         windpipe; "no evidence that the choking was done by the
         accused" [syn: choking, strangling, strangulation,
         throttling]
    2: the condition of having respiration stopped by compression of
       the air passage
    3: (pathology) constriction of a body part so as to cut off the
       flow of blood or other fluid; "strangulation of the
       intestine"