Somnambulation is when a person walks around while they are still sleeping.
Somnambulation can be a little scary or strange, but it's usually harmless.
Examples:
Somnambulation is when someone walks in their sleep.
My brother's somnambulation scares me sometimes.
Last night, I saw somnambulation for the first time.
Somnambulation sounds like a big word for sleepwalking!
In the story, the monster's somnambulation was very spooky.
I read about somnambulation in a book about strange things people do.