Definition of check up on phrasal verb from the Oxford Advanced American Dictionary

 

check up on

 phrasal verb
phrasal verb
 
jump to other results
Phrasal Verbs

check up on somebody

 
jump to other results
to make sure that someone is doing what they should be doing My parents are always checking up on me.

check up on something

 
jump to other results
to find out if something is true or correct I need to check up on a few things before I can decide.
See the Oxford Advanced Learner's Dictionary entry: check up on