Definitions

1. adjective

difficult to sleep; causing or characterized by lack of sleep

“The insomnious environment of the city made it hard for tourists to rest.”

2. adjective

inspiring or causing lack of sleep

“The author’s latest novel was described as an insomnious thriller, perfect for a late-night read.”

3. noun

a quality or state that is difficult to sleep

“Lack of sleep was considered a characteristic of the insomnious nature of the job.”