n. The painful and often ineffectual straining to relieve the bowels
n. a painfully urgent need to urinate or defecate that results in little being passed
the GNU version of the Collaborative International Dictionary of English
n. An urgent and distressing sensation, as if a discharge from the intestines must take place, although none can be effected; -- always referred to the lower extremity of the rectum.
The Century Dictionary and Cyclopedia
n. In medicine, a continual inclination to void the contents of the bowels or bladder, accompanied by straining, but with little or no discharge.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. painful spasm of the anal sphincter along with an urgent desire to defecate without the significant production of feces; associated with irritable bowel syndrome
Word Usage
"The diseases which attacked them were in the form of dysenteries, tenesmus, lientery, and fluxes; but, in some cases, there were dropsies, with or without these complaints."