make certain

make certain (that) something

To check something in order to confirm that it is true, correct, or happening. I just want to make certain that our meeting is still on for tomorrow morning. Will you make certain that our bags are on the train?
See also: certain, make, something
Farlex Dictionary of Idioms.

make ˈcertain (that...)

find out whether something is definitely true: I think there’s a bus at 8 o’clock but you’d better call to make certain.
See also: certain, make
Farlex Partner Idioms Dictionary
See also:
  • leave the door open
  • leave the door open for
  • leave the door open for (something or doing something)
  • take the chance (to do something)
  • take the occasion
  • take the occasion (to do something)
  • take the opportunity (to do something)
  • have half an eye on (someone or something)
  • have one eye on (someone or something)
  • keep half an eye on (someone or something)