ileus /ˈɪliəs/ noun2 •Disruption of the normal propulsive ability of the gastrointestinal tract, due to failure of peristalsis. •(no longer used) Disruption of the normal propulsive ability of the gastrointestinal tract from any cause.When ileus comes on in a case of strangury, they prove fatal in seven days, unless, fever supervening, there be a copious discharge of urine. — 1849 formsilei · ileuses