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"

Moby Thesaurus II by Grady Ward, 1.0:

137 Moby Thesaurus words for "strangulation":
   abbreviation, abolishment, abolition, annihilation, annulment,
   asphyxia, asphyxiation, astriction, astringency, bar, barrier,
   beheading, blank wall, blind alley, blind gut, block, blockade,
   blockage, bottleneck, burking, burning, capital punishment, cecum,
   cervix, choke, choking, choking off, circumscription, clog,
   coarctation, compactedness, compaction, compression, compressure,
   concentration, condensation, congestion, consolidation,
   constipation, constriction, constringency, contraction,
   contracture, costiveness, crucifixion, cul-de-sac, curtailment,
   dead end, decapitation, decollation, decrease, defenestration,
   deracination, diminuendo, drowning, electrocution, elimination,
   embolism, embolus, eradication, execution, extermination,
   extinction, extinguishment, extirpation, fusillade, garrote,
   gassing, gorge, hanging, hemlock, hourglass, hourglass figure,
   impasse, impediment, infarct, infarction, isthmus, jam,
   judicial murder, killing, knitting, lapidation, liquidation,
   liver death, megadeath, narrow place, narrowing, neck,
   necktie party, negation, nullification, obstacle, obstipation,
   obstruction, poisoning, puckering, purge, pursing, reduction,
   rooting out, sealing off, serum death, shooting, shortening,
   silencing, smotheration, smothering, snuffing out, solidification,
   starvation, stifling, stoning, stop, stoppage, stranglement,
   strangling, striction, stricture, suffocation, suppression,
   systole, the ax, the block, the chair, the gallows,
   the gas chamber, the guillotine, the hot seat, the rope,
   throttling, uprooting, violent death, voiding, wasp waist,
   watery grave, wrinkling