NOCTAMBULIST Meaning of NOCTAMBULIST in English [ nɒk'tambjʊlɪst ]■ noun rare a sleepwalker.Derivativesnoctambulism noun OriginC18: from L. nox , noct- 'night' + ambulare 'walk' + -ist . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004