
Keep an eye on somebody/something
Constant Vigilance
The phrase implies continuous attention and watchfulness over a period.

Can you keep an eye on the pot to make sure it doesn't boil over?
Not Literal
It's a figurative expression meaning to be attentive, not to literally watch something non-stop.

I'll keep an eye on the news for any updates about the event.
Caution Implied
Using this phrase often suggests that there might be a risk or issue to be aware of.

Keep an eye on your belongings in crowded areas to avoid theft.
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