make sure

idiom

: to find out or do something so that one has no doubt about whether something is true, correct, will happen, etc.
Make sure (that) you turn the oven off.
They made sure everyone knew where they were supposed to be.

Examples of make sure in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Then, every two weeks, the biologist checks on the coral to make sure algae don’t infiltrate the frame, hindering their growth. Jeanine Barone, Forbes.com, 8 July 2025 Just make sure this step comes after cleansing and applying toner and serum. Katie Decker-Jacoby, StyleCaster, 8 July 2025 When buying a supplement, make sure the product is third-party tested. Merve Ceylan, Health, 8 July 2025 This is a great NBA Summer League matchup; make sure to tune in and catch all the action. Ben Verbrugge, MSNBC Newsweek, 8 July 2025 See All Example Sentences for make sure

Cite this Entry

“Make sure.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/make%20sure. Accessed 19 Jul. 2025.

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!