Definition of somnambulism in English:

somnambulism

noun

  • [mass noun] Sleepwalking:

    ‘she would have liked to wake up from her somnambulism to find herself back in bed’
    • ‘In somnambulism and somniloquy, a child sits up in bed with eyes open but is ‘unseeing.’’
    • ‘Further information included the fact that the patient had no history of somnambulism (sleep walking).’
    • ‘At the same time, there are recent texts in which a representation of somnambulism seems fused with the image of vertical slumber.’
    • ‘They are similar to other arousal disorders that occur during deep sleep, such as somnambulism and confusional arousals.’
    • ‘Other names for it are walking during sleep and somnambulism.’

Origin

Late 18th century: from French somnambulisme, from Latin somnus sleep + ambulare to walk.

Pronunciation:

somnambulism

/sɒmˈnambjʊlɪz(ə)m/