inhibitor
noun
in·hib·i·tor
in-ˈhi-bə-tər 
: one that inhibits: such as
a
: an agent that slows or interferes with a chemical action
b
: a substance that reduces or suppresses the activity of another substance (such as an enzyme)
Examples of inhibitor in a Sentence
Recent Examples on the Web
Baricitinib, a type of Janus kinase (JAK) inhibitor, works by blocking signals in the body that lead to overactivity of the immune system, the researchers explained.
—
Hannah Millington, MSNBC Newsweek, 18 Sep. 2025
Zoryve has a unique active ingredient—roflumilast, an enzyme inhibitor that’s being used for the first time in a topical medication.
—Megan McIntyre, Allure, 16 Sep. 2025
In my research on curiosity, the over and under-utilization of technology turned out to be one of the key inhibitors of curiosity.
—Dr. Diane Hamilton, Forbes.com, 14 Sep. 2025
When combined with immune checkpoint inhibitors – the breakthrough immunotherapy that prevents the immune system from attacking healthy cells – the T cells' tumor-fighting capacity was further enhanced.
—New Atlas, 3 Sep. 2025
See All Example Sentences for inhibitor
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.
Hannah Millington, MSNBC Newsweek, 18 Sep. 2025
Zoryve has a unique active ingredient—roflumilast, an enzyme inhibitor that’s being used for the first time in a topical medication.
—Megan McIntyre, Allure, 16 Sep. 2025
In my research on curiosity, the over and under-utilization of technology turned out to be one of the key inhibitors of curiosity.
—Dr. Diane Hamilton, Forbes.com, 14 Sep. 2025
When combined with immune checkpoint inhibitors – the breakthrough immunotherapy that prevents the immune system from attacking healthy cells – the T cells' tumor-fighting capacity was further enhanced.
—New Atlas, 3 Sep. 2025
See All Example Sentences for inhibitor
Cite this Entry
“Inhibitor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/inhibitor. Accessed 24 Sep. 2025.
Copy CitationMedical Definition
inhibitor
noun
in·hib·i·tor
in-ˈhib-ət-ər
: one that inhibits: as
a
: an agent that slows or interferes with a chemical reaction
b
: a substance that reduces the activity of another substance (as an enzyme)
c
: a gene that checks the normal effect of another nonallelic gene when both are present
Love words? Need even more definitions?
Merriam-Webster unabridged
Share