noun \in-ˈsäm-nē-ə\

: the condition of not being able to sleep

Full Definition of INSOMNIA

:  prolonged and usually abnormal inability to get enough sleep
in·som·ni·ac \-nē-ˌak\ adjective or noun

Examples of INSOMNIA

  1. <has suffered from insomnia virtually his entire life>

Origin of INSOMNIA

Latin, from insomnis sleepless, from in- + somnus sleep — more at somnolent
First Known Use: circa 1623

Related to INSOMNIA


noun \in-ˈsäm-nē-ə\   (Medical Dictionary)

Medical Definition of INSOMNIA

: prolonged and usually abnormal inability to obtain adequate sleep—called also agrypnia


noun    (Concise Encyclopedia)

Inability to sleep adequately. The causes may include poor sleeping conditions, circulatory or brain disorders, breathing disorders (e.g., sleep apnea), mental distress (e.g., tension or depression), or physical discomfort. Mild insomnia may be treated by improving sleeping conditions or through traditional remedies such as warm baths, milk, or systematic relaxation. Apnea and its associated insomnia may be treated surgically or mechanically with breathing apparatus. Severe or chronic insomnia may necessitate the temporary use of barbiturates or tranquilizers, but such drugs are often addictive and may be decreasingly effective as the body builds up tolerance. Other methods of treatment include psychotherapy and hypnosis.


Next Word in the Dictionary: insomnious
Previous Word in the Dictionary: insolvent
All Words Near: insomnia

Seen & Heard

What made you want to look up insomnia? Please tell us where you read or heard it (including the quote, if possible).