Somnambulism
Pronunciation : Som*nam"bu*lism
Part of Speech : n.
Etymology : [Cf. F. somnambulisme. See Somnambulation.]
Definition : Defn: A condition of the nervous system in which an individual during sleep performs actions approppriate to the waking state; a state of sleep in which some of the senses and voluntary powers are partially awake; noctambulism.
Source : Webster's Unabridged Dictionary, 1913