1. keep an eye on - Verb
2. keep an eye on - Phrase
follow with the eyes or the mind
Source: WordNetMy wife is always trying to get rid of me. The other day she told me to put the garbage out. I said to her I already did. She told me to go and keep an eye on it. Rodney Dangerfield
I really have to keep an eye on myself, because sometimes I think I might say something important. Leslie Nielsen
If I were the government I would have a special brigade of gendarmes to keep an eye on artists who paint landscapes from nature. Oh, I don't mean to kill anyone; just a little dose of bird-shot now and then as a warning. Edgar Degas
Israel became a nation again in 1948. If the strange verse in Psalm 90:10 regarding the 70 or 80 years before we "fly away” ties in here, that would add up to 2018 or 2028. I'm gonna really keep an eye on Israel and that temple mount! Kent Hovind
We keep an eye on the scorpion and the serpent, but we do not watch out for the millipede. Sicilian Proverb
When the fox is engaging you in conversation, keep an eye on your chicken. Basque Proverb