prolapse, prolapsus; prolapses (pl); prolapsed 1. A slippage or sinking of a body organ or part; such as, a valve of the heart from its usual position. 2. To slip or to fall out of its proper place in the body; prolapsed. 3. A sinking of an organ or other part, especially its appearance at a natural or artificial orifice. 4. Originally in Englis... Found on http://www.wordinfo.info/words/index/info/view_unit/1148/2