inflammation

noun

in·​flam·​ma·​tion ˌin-flə-ˈmā-shən How to pronounce inflammation (audio)
Synonyms of inflammationnext
1
: a local response to cellular injury that is marked by capillary dilatation, leukocytic infiltration, redness, heat, and pain and that serves as a mechanism initiating the elimination of noxious agents and of damaged tissue
2
: the act of inflaming : the state of being inflamed

Examples of inflammation in a Sentence

The drug is used to reduce inflammation. inflammations of the throat and ears
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.
Researchers at the University of Pittsburgh School of Medicine engineered the harmless eye-dwelling microbe Corynebacterium mastitidis to secrete interleukin-10 (IL-10), a protein that regulates inflammation and supports wound healing. Samantha Agate, Kansas City Star, 16 June 2026 How the Living Eye Drops Work The Pitt team engineered Corynebacterium mastitidis, a benign microbe that already resides under the eyelid, to continuously secrete interleukin-10 (IL-10), a small protein that regulates inflammation. Samantha Agate, Charlotte Observer, 16 June 2026 Reactive oxygen species, inflammation and collagen breakdown are three of the central mechanisms behind visible skin aging, which is why the finding has drawn attention beyond the lab. Allison Palmer, Fort Worth Star-Telegram, 15 June 2026 Ohtani returned to the lineup for the Dodgers’ 7-1 win against the White Sox, after exiting the game Thursday at Pittsburgh and missing Friday‘s game because of inflammation in his left knee. Maddie Lee, Los Angeles Times, 14 June 2026 See All Example Sentences for inflammation

Word History

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of inflammation was in the 15th century

Browse Nearby Words

Cite this Entry

“Inflammation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/inflammation. Accessed 16 Jun. 2026.

Kids Definition

inflammation

noun
in·​flam·​ma·​tion ˌin-flə-ˈmā-shən How to pronounce inflammation (audio)
1
: the act of inflaming : the state of being inflamed
2
: a bodily response to injury in which heat, redness, pain, swelling, and more than the usual amount of blood are present in the area affected

Medical Definition

inflammation

noun
in·​flam·​ma·​tion ˌin-flə-ˈmā-shən How to pronounce inflammation (audio)
: a local response to cellular injury that is marked by capillary dilatation, leukocytic infiltration, redness, heat, pain, swelling, and often loss of function and that serves as a mechanism initiating the elimination of noxious agents and of damaged tissue
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