Source : Webster's Revised Unabridged Dictionary (1913)

Choking \Chok"ing\, a.
   1. That chokes; producing the feeling of strangulation.

   2. Indistinct in utterance, as the voice of a person affected
      with strong emotion.

Choke \Choke\, v. t. [imp. & p. p. {Choked}; p. pr. & vb. n.
   {Choking}.] [OE. cheken, choken; cf. AS. [=a]ceocian to
   suffocate, Icel. koka to gulp, E. chincough, cough.]
   1. To render unable to breathe by filling, pressing upon, or
      squeezing the windpipe; to stifle; to suffocate; to
      strangle.

            With eager feeding food doth choke the feeder.
                                                  --Shak.

   2. To obstruct by filling up or clogging any passage; to
      block up. --Addison.

   3. To hinder or check, as growth, expansion, progress, etc.;
      to stifle.

            Oats and darnel choke the rising corn. --Dryden.

   4. To affect with a sense of strangulation by passion or
      strong feeling. ``I was choked at this word.'' --Swift.

   5. To make a choke, as in a cartridge, or in the bore of the
      barrel of a shotgun.

   {To choke off}, to stop a person in the execution of a
      purpose; as, to choke off a speaker by uproar.

Source : WordNet®

choking
     n 1: a condition caused by blocking the airways to the lungs (as
          with food or swelling of the larynx)
     2: the act of suffocating (someone) by constricting the
        windpipe; "no evidence that the choking was done by the
        accused" [syn: {strangling}, {strangulation}, {throttling}]