Source : Webster's Revised Unabridged Dictionary (1913)

Constriction \Con*stric"tion\, n. [L. constrictio: cf. F.
   constriction.]
   1. The act of constricting by means of some inherent power or
      by movement or change in the thing itself, as
      distinguished from compression.

   2. The state of being constricted; the point where a thing is
      constricted; a narrowing or binding.

            A constriction of the parts inservient to speech.
                                                  --Grew.

Source : WordNet®

constriction
     n 1: a narrowing that reduces the flow through a channel [syn: {bottleneck},
           {chokepoint}]
     2: tight or narrow compression [syn: {coarctation}]
     3: a feeling of tightness in some part of the body; "he felt a
        constriction in her chest"; "emotion caused a constriction
        of his throat"
     4: the action or process of compressing