One who sleepwalks at night; a somnambulist.(noun)
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Use "noctambulist" in a sentence
"An exhausted proprietor at the head of his waiters, crazed with sleepiness, eventually succeeds in driving these noctambulist apostles into the streets."
"There are episodes in his life that recall the career of another man of genius, Gerard de Nerval, poet, noctambulist, suicide."
"Thompson christened a prestidigious noctambulist-has literally stormed over it."