a person who walks, eats, or performs other motor acts while asleep and is unaware of doing so upon awakening; a person with a disorder characterized by this: A sleepwalker may do something that could cause injury, such as climbing out of a window or walking into objects.
a person who acts seemingly without awareness, feeling, aim, or will: My parents were sleepwalkers, moving about their world as if oblivious to it and to themselves.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use sleepwalker in a sentence
Later, he describes himself as “a sleepwalker—who turns off the alarm clock.”
Neither was it the face of a dreamer or a sleepwalker, or of the dead, when the lines disappear and life retires.The Necromancers | Robert Hugh Benson
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
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
Emil overtook her and catching her by the shoulders shook her gently, as if he were trying to awaken a sleepwalker.O Pioneers! | Willa Cather
“This way,” answered Molly, looking indeed like a sleepwalker as she glided down the hall to the main steps.Molly Brown's Junior Days | Nell Speed