sleepwalking

[ 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

sleep·walk·er, noun

Later, he describes himself as “a sleepwalker—who turns off the alarm clock.”

Gabrielle Giffords' Gunman: Jared Lee Loughner |Eve Conant |January 8, 2011 |DAILY BEAST
She came into the room with her eyelids so demurely lowered that she might have been taken for a sleepwalker.

Ainslee's magazine, Volume 16, No. 3, October, 1905 |Various
But she went confidently on like a sleepwalker who saves himself from dangers that would be death to him in waking.

Between The Dark And The Daylight |William Dean Howells
He went about extinguishing the gas as aimlessly and mechanically as a sleepwalker, unaware of the things he was touching.

The Cottage of Delight |Will N. Harben

When at length the candle was lighted, he took it in his hand and went into the parlour like a sleepwalker.

The Manxman |Hall Caine
The girl moved with the absorption of a sleepwalker beside Jude whose shufflings bespoke nervous tension.

Joyce of the North Woods |Harriet T. Comstock

sleepwalking

[ slēp′wô′kĭng ]

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

sleep′walk′ v. sleep′walk′er n.