1. A person who regularly experiences insomnia, characterized by difficulty falling asleep or staying asleep
The insomniac struggled to fall asleep despite being exhausted.
A pessoa que sofre de insônia lutava para adormecer apesar de estar exausta.
2. Someone who is awake during normal sleeping hours, often due to sleep disorders
As an insomniac, she spent her nights reading and writing.
Como pessoa com insônia, ela passava as noites lendo e escrevendo.