inhibitor

noun

in·​hib·​i·​tor in-ˈhi-bə-tər How to pronounce inhibitor (audio)
: 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
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.
Here’s the other inhibitor to moving back: Sean Payton. Parker Gabriel, Denver Post, 15 Apr. 2025 Topical calcineurin inhibitors: Topical calcineurin inhibitors like Protopic (tacrolimus) are an alternative to corticosteroids. Mark Gurarie, Health, 27 Mar. 2025 Other types of medication that could be prescribed to treat osteoporosis include: Parathyroid hormone (PTH) analogs, RANKL inhibitor, sclerostin inhibitors, calcitonin analogs and Selective Estrogen Receptor Modulators (SERMs), according to the FDA. Making healthy lifestyle decisions. Caroline C. Boyle, USA TODAY, 22 Mar. 2025 The immune system and the microbiome Early on in his treatment, Story was given an immunotherapy drug called a PD-1 inhibitor. David Cox, NBC News, 14 Mar. 2025 See All Example Sentences for inhibitor

Word History

First Known Use

circa 1611, in the meaning defined above

Time Traveler
The first known use of inhibitor was circa 1611

Browse Nearby Words

Cite this Entry

“Inhibitor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/inhibitor. Accessed 23 Apr. 2025.

Medical Definition

inhibitor

noun
in·​hib·​i·​tor in-ˈhib-ət-ər How to pronounce inhibitor (audio)
: 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
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!