Somnambulation

Origin

Latin somnus sleep + ambulatio a walking about, from ambulare to walk. See somnolent, amble.

Full definition of somnambulation

Noun

1. (rare) The phenomenon of sleepwalking.He is known for his somnambulation, as well as his vivid sleep-talking.
2. (rare) An instance of sleepwalking.He broke his arm on one of his many somnambulations.