Meaning of the word sleepless in English

What does sleepless mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

sleepless

US /ˈsliːp.ləs/
UK /ˈsliːp.ləs/

Adjective

without sleep; unable to sleep

Example:
He spent a sleepless night worrying about the exam.
The baby cried all night, giving her a sleepless night.