Meaning of the word watchful in English

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

watchful

US /ˈwɑːtʃ.fəl/
UK /ˈwɒtʃ.fəl/
"watchful" picture

Adjective

watching someone or something closely; alert and vigilant

Example:
The mother kept a watchful eye on her children at the park.
Security guards must remain watchful at all times.