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Synonyms

inflammation

American  
[in-fluh-mey-shuhn] / ˌɪn fləˈmeɪ ʃən /

noun

  1. Pathology. redness, swelling, pain, tenderness, heat, and disturbed function of an area of the body, especially as a reaction of tissues to injurious agents.

  2. the act or fact of inflaming.

  3. the state of being inflamed.

inflammation British  
/ ˌɪnfləˈmeɪʃən /

noun

  1. the reaction of living tissue to injury or infection, characterized by heat, redness, swelling, and pain

  2. the act of inflaming or the state of being inflamed

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
inflammation Scientific  
/ ĭn′flə-mā′shən /

  1. The reaction of a part of the body to injury or infection, characterized by swelling, heat, redness, and pain. The process includes increased blood flow with an influx of white blood cells and other chemical substances that facilitate healing.

inflammation Cultural  

  1. The response of tissue to injury or infection. Pain, heat, redness, and swelling are the four basic symptoms of inflammation.

Other Word Forms

  • subinflammation noun

Etymology

Origin of inflammation

First recorded in 1525–35; from Latin inflammātiōn-, stem of inflammātiō, from inflammāt(us) “kindled” (past participle of inflammāre “to kindle”; inflame ) + -iō -ion

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Increased levels of klotho are thought to combat inflammation and improve cognition, and therapies to boost its production are being developed in the U.S. to target specific neurodegenerative ailments, such as Lou Gehrig’s disease.

From Slate • Mar. 30, 2026

The treatment reduced harmful bacteria such as Porphyromonas gingivalis and Staphylococcus aureus and lowered inflammation levels.

From Science Daily • Mar. 23, 2026

Gilead said the deal would bolster its growing inflammation portfolio, adding gamgertamig.

From The Wall Street Journal • Mar. 23, 2026

The biotech company released positive data for a Phase 2 study evaluating the efficacy of zumilokibart, a monoclonal antibody targeting proteins related to inflammation, in patients with atopic dermatitis.

From Barron's • Mar. 23, 2026

Dog bites and knife nicks on the men’s hands were frequently infected with seal blood, but there were no antibiotics to treat the inflammation.

From "Shipwreck at the Bottom of the World" by Jennifer Armstrong

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.