check on somebody/something phrasal verb ( see also ↑ check )
1 . to make sure that someone or something is safe, is in a satisfactory state, or is doing what they should be doing:
Honey, can you go upstairs and check on the kids?
My neighbour comes in once a week to check on things and feed the fish.
2 . to try to find out if something is true or correct:
He wanted to check on the girl’s story.