intr.v., -lapsed, -laps·ing, -laps·es.
To fall or slip out of place.
n. prolapse (prō'lăps', prō-lăps') also pro·lap·sus (prō-lăp'səs)
The falling down or slipping out of place of an organ or part, such as the uterus.
[Latin prōlābī, prōlāps-, to fall down : prō-, forward; see pro-1 + lābī, to fall.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.