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

When using a purchased potato, look for an organic variety less likely to have been treated with a sprout inhibitor. —Barbara Gillette, The Spruce, 10 May 2026

Rubbing alcohol and vinegar are anti-fungal and mold inhibitors, while dish soap emulsifies body oils. —Rae Ford, Martha Stewart, 10 May 2026

Lellio remained on the inhibitor for two years. —Kerry Breen, CBS News, 9 May 2026

Still, Loeb notes that cholinesterase inhibitors, which are often used for people with Alzheimer's, can help improve cognition and alertness in patients with Lewy body dementia. —Sara Moniuszko, USA Today, 6 May 2026

Word History

First Known Use

circa 1611, in the meaning defined above

Phrases Containing inhibitor

• ACE inhibitor
• protease inhibitor
• proton pump inhibitor
• selective serotonin reuptake inhibitor

Rhymes for inhibitor

• exhibitor

Medical 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