make certain

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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. © 2015 Farlex, Inc, all rights reserved.

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 © Farlex 2017
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