Someone who walks about in their sleep.

plural of sleepwalker

(intransitive) To walk and/or perform other actions while sleeping; to somnambulate.

Third-person singular simple present indicative form of sleepwalk

simple past tense and past participle of sleepwalk

The act of walking while not conscious or aware of it, during one's sleep.

present participle of sleepwalk

plural of sleepwalking