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

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The right setting: When ironing fabrics that can melt, like polyester, make certain to set the heat according to the label on the clothing. —

Daley Quinn, Southern Living, 2 Feb. 2025 The department wants to make certain its social media account's messaging and updates are consistent with the Trump administration's goals. —

Chloe Atkins, NBC News, 24 Jan. 2025 Some products may make certain skin conditions — such as acne — worse, and some may do absolutely nothing for your skin. —

Monica Cull, Discover Magazine, 20 Jan. 2025 Some of those tools might be woefully out of date, because pathogens have evolved; antibiotic resistance could also make certain bacterial infections more difficult to expunge than in decades prior. —

Katherine J. Wu, The Atlantic, 28 Jan. 2025 See all Example Sentences for make certain