inflammation

noun

in·​flam·​ma·​tion ˌin-flə-ˈmā-shən 

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

People in their teens and early 20s are considered to be at greater risk for this type of rare but serious bacterial infection called meningococcal group B that can lead to meningitis, an inflammation in the membranes that cover the spinal cord and brain. —Kathleen Felton, Washington Post, 25 Mar. 2026

For more advanced cases, Douxo S3 wipes are an excellent over-the-counter choice when inflammation, infection, yeast, or bacterial overgrowth is a concern. —Trisha Easto, USA Today, 24 Mar. 2026

For Sam, [a teen patient of mine] with crippling pain that kept him in bed for four years, this included a family history of migraine, poor sleep, inadequate nutrition, changes in hormones and brain chemicals, eye strain, and inflammation. —Big Think, 24 Mar. 2026

Though Tatum and Brown both suited up for Boston, their opponent was missing its top star, Anthony Edwards, who missed his fourth straight game with right knee inflammation. —Zack Cox, Boston Herald, 23 Mar. 2026

Word History

First Known Use

15th century, in the meaning defined at sense 1

Phrases Containing inflammation

• anti-inflammation

Rhymes for inflammation

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• acclimation
• accusation
• activation
• actuation
• acylation

Kids Definition

inflammation

noun

in·​flam·​ma·​tion ˌin-flə-ˈmā-shən 

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 

: 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