- rare the act of talking in one's sleep
C19: from Latin somnus sleep + loqui to speak; compare soliloquy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for somniloquy
Online Etymology Dictionary, © 2010 Douglas Harper
- The act or habit of talking in one's sleep.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.