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

Orchestrated by malicious, highly skilled threat actors, Black Kite’s research further suggests that these attacks are increasingly aimed at smaller businesses (anual revenue less then $20 million) that often have fewer sophisticated defense mechanisms in place. —Sandra Pretorius, Forbes, 1 Nov. 2024

Related article Woolly rhino found preserved in Russian permafrost after 32,000 years Fireflies glow for a multitude of reasons, most commonly as a defense mechanism and a way to communicate and attract mates. —Taylor Nicioli, CNN, 24 Oct. 2024

While some of the effects can be dire, the ocean does have some defense mechanisms in place. —Devika Rao, theweek, 10 Oct. 2024

There’s also this analogy of war and defense mechanisms and the hard, brutal reality of that. —Kyle Denis, Billboard, 18 Oct. 2024

Word History

First Known Use

1909, in the meaning defined at sense 1

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