Sleepwalker
/ˈsliːpwɔːkər/
Definition 1 of 1
Pro Tip 1/3Physical Activity
The term emphasizes the physical movement during sleep, often unaware and unintentional. 
The sleepwalker managed to open a window in her slumber.
Pro Tip 2/3Not Dreamwalking
'Sleepwalker' is different from 'dreamwalker'; 'sleepwalker' refers to actual physical walking. 
Unlike dreamwalkers, sleepwalkers can bump into furniture.
Pro Tip 3/3Safety Concern
The word may suggest safety risks, as sleepwalkers are unaware of their environment. 
As a sleepwalker, she had alarms installed on her doors.