1. A state of sleep characterized by unconsciousness and minimal responsiveness to external stimuli, typically occurring during the deeper stages of the sleep cycle
After working all day, he fell into a deep sleep.
Depois de trabalhar o dia todo, ele caiu em um sono profundo.
2. Restful, restorative sleep that is difficult to interrupt
The medication helped her achieve a deep sleep for the first time in months.
O medicamento ajudou-a a conseguir um sono profundo pela primeira vez em meses.