Meaning of the word "keep an eye out for" in English

What does "keep an eye out for" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

keep an eye out for

US /kiːp ən aɪ aʊt fɔːr/
UK /kiːp ən aɪ aʊt fɔːr/

Idiom

to watch carefully for someone or something to appear

Example:
Can you keep an eye out for my package? It should arrive today.
We need to keep an eye out for any suspicious activity.