noun. blockage of the intestine (especially the ileum) that prevents the contents of the intestine from passing to the lower bowel.
1. Noun, singular or mass If you have an ileus, you should not eat until it is resolved. 2. Adjective To confirm an ileus diagnosis, your physician may order an X-ray or CT scan. 3. Verb, base form Low potassium levels lead to muscular weakness, fatigue, cardiac electrical problems and constipation due to ileus.