Source : Webster's Revised Unabridged Dictionary (1913)

Constipation \Con`sti*pa"tion\, n. [L. constipatio a crowding
   together: cf. F. constipation.]
   1. Act of crowding anything into a less compass, or the state
      of being crowded or pressed together; condensation. [Obs.]

            Fullness of matter, or a pretty close constipation .
            . . of its particles.                 --Boyle.

   2. A state of the bowels in which the evacuations are
      infrequent and difficult, or the intestines become filled
      with hardened f[ae]ces; costiveness.

Source : WordNet®

constipation
     n 1: irregular and infrequent or difficult evacuation of the
          bowels; can be a symptom of intestinal obstruction or
          diverticulitis [syn: {irregularity}]
     2: the act of making something futile and useless (as by
        routine) [syn: {stultification}, {impairment}, {deadening}]