What does "keep an eye on" mean?

To watch and pay attention to, in case of misbehaviour or mishap.

What is a synonym for "keep an eye on"?

Common synonyms include: attend to, au courant, baby-sit, be vigilant, be watchful, boss.

verb

verb ·Uncommon ·Advanced level

Verb

1
To watch and pay attention to, in case of misbehaviour or mishap. idiomatic
"I must keep an eye on this sauce in case it curdles."
2
follow with the eyes or the mind wordnet

"I must keep an eye on this sauce in case it curdles."