defense mechanism

noun

1
: an often unconscious mental process (such as repression) that makes possible compromise solutions to personal problems
2
: a defensive reaction by an organism

Examples of defense mechanism in a Sentence

She is projecting her anger on you as a defense mechanism. the cell's normal defense mechanisms against infection
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.
Jod suggested that some sort of defense mechanism is also in play, but Brutus wasn’t having it. Matt Webb Mitovich, TVLine, 7 Jan. 2025 To help patients understand anxiety, therapists often compare it to being chased by a tiger, since anxiety was originally a defense mechanism against predators like tigers. Kathryn Kvas, The New Yorker, 31 Dec. 2024 Among their notable characteristics, these fish have a parrot-like beak and can inflate their bodies by swallowing mouthfuls of water as a defense mechanism against predators. David Faris, Newsweek, 27 Dec. 2024 Tony Khan And The ‘Ethan Page Effect’ Khan’s decision to keep disgruntled talent under contract, while polarizing, is also a defense mechanism. Alfred Konuwa, Forbes, 18 Dec. 2024 See all Example Sentences for defense mechanism 

Word History

First Known Use

1909, in the meaning defined at sense 1

Time Traveler
The first known use of defense mechanism was in 1909

Dictionary Entries Near defense mechanism

Cite this Entry

“Defense mechanism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/defense%20mechanism. Accessed 20 Jan. 2025.

Medical Definition

defense mechanism

noun
1
: an often unconscious mental process (as repression, projection, or sublimation) that makes possible compromise solutions to personal problems
2
: a defensive reaction by an organism

More from Merriam-Webster on defense mechanism

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