[ sleep-waw-king ]
/ ˈslipˌwɔ kɪŋ /


the act or state of walking, eating, or performing other motor acts while asleep, of which one is unaware upon awakening; somnambulism.


of or relating to the state of walking while asleep; somnambulistic.

Origin of sleepwalking

First recorded in 1790–1800; sleep + walking

OTHER WORDS FROM sleepwalking

sleep·walk·er, noun

Definition for sleepwalking (2 of 2)

[ sleep-wawk ]
/ ˈslipˌwɔk /

verb (used without object)

to engage in sleepwalking.


an act of sleepwalking; somnambulation.

Origin of sleepwalk

First recorded in 1920–25; back formation from sleepwalking Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sleepwalking

British Dictionary definitions for sleepwalking

/ (ˈsliːpˌwɔːk) /


(intr) to walk while asleepSee also somnambulism

Derived forms of sleepwalk

sleepwalker, nounsleepwalking, noun, adjective
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

Medicine definitions for sleepwalking

[ slēpwô′kĭng ]


The act of walking or performing another activity associated with wakefulness while asleep or in a sleeplike state.noctambulism somnambulism

Other words from sleepwalking

sleepwalk′ v.sleepwalk′er n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.