Dictionary.com
Thesaurus.com
Synonyms

somnambulism

American  
[som-nam-byuh-liz-uhm, suhm-] / sɒmˈnæm byəˌlɪz əm, səm- /

noun

  1. sleepwalking.


somnambulism British  
/ sɒmˈnæmbjʊˌlɪzəm /

noun

  1. Also called: noctambulism.  a condition that is characterized by walking while asleep or in a hypnotic trance

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Etymology

Origin of somnambulism

First recorded in 1790–1800; from French somnambulisme, from New Latin somnambulismus, equivalent to somn(us) “sleep” + ambul(āre) “to walk” + -ismus -ism

Explanation

Somnambulism is sleepwalking. Some people have managed to walk around their neighborhood without even knowing it because of somnambulism. The roots of this word — somn and amublate — are related to sleep and walking, and that's exactly what somnambulism is: walking in your sleep. Lots of people engage in somnambulism every night, usually harmlessly. Somnambulism can also include talking in your sleep and doing other activities.

Keep Reading on Vocabulary.com

Vocabulary lists containing somnambulism

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

London news organs distanced all others in advancing hypotheses: Daily Chronicle: "Somnambulism."

From Time Magazine Archive

Somnambulism might solve the second riddle, but to the first I could find no answer acceptable to my reason.

From Bat Wing by Rohmer, Sax

So strangely is Freedom, as we say, environed in Necessity; such a singular Somnambulism, of Conscious and Unconscious, of Voluntary and Involuntary, is this life of man.

From The French Revolution by Carlyle, Thomas

The confusion of excitement led often to Somnambulism, which was not yet understood, and to belief in miracles.

From Pedagogics as a System by Brackett, Anna C. (Anna Callender)

Somnambulism was well known by the ancients; and Aristotle tells us, “there are individuals who rise in their sleep, and walk about seeing as clearly as those that are awake.”

From Curiosities of Medical Experience by Millingen, J. G. (John Gideon)

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "somnambulism" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com