keep an eye on sb/sth

/kˈiːp ɐn ˈaɪ ˌɒn ˌɛsbˈiː slˈaʃ ˌɛstˌiːˈeɪtʃ/

/kˈiːp ɐn ˈaɪ ˌɑːn ˌɛsbˈiː slˈæʃ ˌɛstˌiːˈeɪtʃ/

[phrase]

to keep an eye on sb/sth

[PHRASE]

to closely watch a person or thing, particularly in order to make sure they are safe

synonyms : follow

observe

watch

watch over

Examples

1. Just told me to keep an eye on her and whatnot.

2. Blockbuster had an innovative new barcode system, which meant that they could track up to 10,000 VHSs per store to each registered customer, which also meant that they could keep an eye on those lucrative late fees.

3. So just having basic practices like keeping an eye on your bank statements, checking it out once a week, make sure there are no unauthorized purchases.

4. What essentially that allowed the federal government to do was to collect the names and identifying information of everyone who is involved in the cannabis trade, making it easier to keep an eye on them and essentially allow the government to survey their activities.