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
Players are expected to make certain times during their many sprints.
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Gary Bedore, Kansas City Star, 8 Sep. 2025
For example, the tech company will need to make certain search data available to qualified competitors to promote competition.
—Jade Walker, CNN Money, 3 Sep. 2025
Mehta did side with the government on some provisions, requiring Google to make certain search index and user interaction data and search syndication services available to competitors.
—Sylvan Lane, The Hill, 3 Sep. 2025
Engineers at the University of Colorado, Boulder, have developed a way to harness their efficiency, which could make certain aquatic research much easier.
—Neetika Walter, Interesting Engineering, 20 Aug. 2025
See All Example Sentences for make certain
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Gary Bedore, Kansas City Star, 8 Sep. 2025
For example, the tech company will need to make certain search data available to qualified competitors to promote competition.
—Jade Walker, CNN Money, 3 Sep. 2025
Mehta did side with the government on some provisions, requiring Google to make certain search index and user interaction data and search syndication services available to competitors.
—Sylvan Lane, The Hill, 3 Sep. 2025
Engineers at the University of Colorado, Boulder, have developed a way to harness their efficiency, which could make certain aquatic research much easier.
—Neetika Walter, Interesting Engineering, 20 Aug. 2025
See All Example Sentences for make certain
Cite this Entry
“Make certain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/make%20certain. Accessed 12 Sep. 2025.
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