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
Tapioca starch can also be used as an agent to bind tablets together to make certain medications.
—
Kristen Gasnick, Verywell Health, 7 Oct. 2025
Experts have raised concerns that those tariffs could cause supply chain issues and make certain drugs more difficult and expensive to acquire.
—Brett Samuels, The Hill, 26 Sep. 2025
In addition to hyperlocal offerings, the Federal Emergency Management Agency offers grants to communities and individuals who make certain upgrades.
—Kristine Gill, Better Homes & Gardens, 25 Sep. 2025
Spaceflight may make certain types of human stem cells age faster, a study suggests — but at least some of the damage may be reversible.
—Elizabeth Howell, Space.com, 17 Sep. 2025
See All Example Sentences for make certain
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.
Kristen Gasnick, Verywell Health, 7 Oct. 2025
Experts have raised concerns that those tariffs could cause supply chain issues and make certain drugs more difficult and expensive to acquire.
—Brett Samuels, The Hill, 26 Sep. 2025
In addition to hyperlocal offerings, the Federal Emergency Management Agency offers grants to communities and individuals who make certain upgrades.
—Kristine Gill, Better Homes & Gardens, 25 Sep. 2025
Spaceflight may make certain types of human stem cells age faster, a study suggests — but at least some of the damage may be reversible.
—Elizabeth Howell, Space.com, 17 Sep. 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 24 Oct. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share