sleepwalker

Từ điển WordNet v3.1 - WordNet Dictionary

noun

someone who walks about in their sleep (Freq. 1)
• Syn:
somnambulist, noctambulist
• Derivationally related forms:
noctambulism (for: noctambulist), somnambulism (for: somnambulist), sleepwalk
• Hypernyms:
sleeper, slumberer