make sure

Idioms

make sure (of something/that…)

to do something in order to be certain that something else happens

Make sure (that) no one finds out about this.

They scored another goal and made sure of victory.

Our staff will do their best to make sure you enjoy your visit.

To make doubly sure they would not be disturbed she turned the key in the lock.

​ to check that something is true or has been done

She looked around to make sure that she was alone.

I think the door's locked, but I'll just go and make sure.

e.g.