Definition of parasomnia in English:


Pronunciation /ˌperəˈsämnēə/ /ˌpɛrəˈsɑmniə/


  • A disorder characterized by abnormal or unusual behavior of the nervous system during sleep.

    ‘he's being treated for parasomnia at a sleep disorder clinic’
    • ‘Sleepwalking is a form of parasomnia, a class of sleep disorders characterized by partial wakefulness.’
    • ‘Nocturnal head banging, sleep talking and nocturnal leg cramps are other rare forms of parasomnia.’
    • ‘Almost 20-40 percent of all normal kids have parasomnia at least once in their lifetimes.’
    • ‘Keep reading to learn about the three categories of parasomnia (rhythmic, paroxysmal, and static disorders) and find out how you can help your child.’
    • ‘In some cases, parasomnia can cause people to commit crimes in their sleep.’


1930s blend of para- and insomnia.