keep an/your eye on somebody/something
keep (one's)/an eye on (someone or something)
To watch someone or something carefully; to be attentive to someone or something. You need to keep your eye on the soup so that it doesn't bubble over. Sure, I can keep an eye on the baby while you go to the store.
keep an eye on someone or somethingand have an eye on someone or something; keep one's eye(s) on someone or something; have one's eye on someone or something
Fig. to watch someone or something; to monitor someone or something closely. I have my eye on the apple tree. When the apples ripen, I'll harvest them. Please keep an eye on the baby. Will you please keep your eye on my house while I'm on vacation?
keep an/your ˈeye on somebody/somethingtake responsibility for somebody/something; make sure that somebody/something is safe: It’s my job to keep an eye on how the money is spent. ♢ Keep an eye on my bag while I go and make a phone call, will you?
keep an eye on
1. To watch over attentively; mind.
2. To watch closely or carefully: keep your eye on the ball.