make certain

idiom

: to do something or find out something so that one has no doubt about whether something is true, correct, will happen, etc.

Make certain (that) you lock the door when you leave.

We must make certain this doesn't happen again.

She made certain she thanked each of them for coming.

Examples of make certain in a Sentence

Recent Examples on the Web

The White House argues that Biden's public schedule is part of an intentional communications strategy timed to make certain newscasts, and not related to his age. —Alex Thompson, Axios, 6 Oct. 2024

But the city can make certain zoning which is not restrictive or overly burdensome. —Gqlshare, Orange County Register, 4 Oct. 2024

That bill would make certain changes to the Medicare Physician Fee Schedule, including raising the threshold for budget neutrality from $20 million to $53 million to help accommodate rising provider costs. —Peter Sullivan, Axios, 11 Sep. 2024

And scientists can genetically alter mice in countless ways, knocking out or adding DNA to express diseases or make certain cell types glow under a microscope. —Celia Ford, Vox, 6 Sep. 2024