immune response

noun

: a bodily response to an antigen that occurs when lymphocytes identify the antigenic molecule as foreign and induce the formation of antibodies and lymphocytes capable of reacting with it and rendering it harmless

called also immune reaction

Examples of immune response 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.
Psoriasis is a chronic condition characterized by an overactive immune response that leads to excessive skin cell growth, creating thick patches called plaques. Petra Guglielmetti, Glamour, 27 May 2026 Sepsis develops when an infection triggers a harmful immune response. Sara Moniuszko, USA Today, 26 May 2026 The goal is to try to control both the infection and the body’s rising immune response before the entire system gets overwhelmed. Dr. Jamin Brahmbhatt, CNN Money, 24 May 2026 Bradfute says some research suggests the Ebola virus is more effective at blocking this innate immune response than the Bundibugyo virus, which could be one reason the latter has a lower fatality rate. Claire Maldarelli, Scientific American, 22 May 2026 See All Example Sentences for immune response

Word History

First Known Use

1923, in the meaning defined above

Time Traveler
The first known use of immune response was in 1923

Browse Nearby Words

Cite this Entry

“Immune response.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/immune%20response. Accessed 31 May. 2026.

Kids Definition

immune response

noun
: a bodily response to a foreign substance, cell, or tissue that involves the formation of antibodies and cells capable of reacting with it and rendering it harmless

called also immune reaction

Medical Definition

immune response

noun
: a bodily response to an antigen that occurs when lymphocytes identify the antigenic molecule as foreign and induce the formation of antibodies and lymphocytes capable of reacting with it and rendering it harmless

called also immune reaction

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