CHECK UP ON SOMEONE/THING

{v}. To try to find out the truth or rightness of; make sure of; examine; inspect; investigate. * /We checked on Dan's age by getting his birth record./ * /Mrs. Brown said she heard someone downstairs and Mr. Brown went down to check up on it./ * /You can check on your answers at the back of the book./ * /The police are checking up on the man to see if he has a police record./ * /Grandfather went to have the doctor check on his health./ Compare: LOOK INTO, LOOK OVER.