Sleepwalker

sleepwalking

[sleep-waw-king]
noun
1.
the act or state of walking, eating, or performing other motor acts while asleep, of which one is unaware upon awakening; somnambulism.
adjective
2.
of or pertaining to the state of walking while asleep; somnambulistic.

Origin:
1790–1800; sleep + walking

sleepwalker, noun
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World English Dictionary
sleepwalk (ˈsliːpˌwɔːk)
 
vb
(intr) See also somnambulism to walk while asleep
 
'sleepwalker
 
n
 
'sleepwalking
 
n, —adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

sleepwalking sleep·walk·ing (slēp'wô'kĭng)
n.
The act of walking or performing another activity associated with wakefulness while asleep or in a sleeplike state. Also called noctambulism, somnambulism.


sleep'walk' v.
sleep'walk'er n.
The American Heritage® Stedman's Medical Dictionary
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