malicious

adjective

ma·​li·​cious mə-ˈli-shəs How to pronounce malicious (audio)
Synonyms of malicious
: having or showing a desire to cause harm to someone : given to, marked by, or arising from malice
malicious gossip
maliciously adverb
maliciousness noun

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Malicious, Malevolent, and Malice

Malicious and malevolent are close in meaning, since both refer to ill will that desires to see someone else suffer. But while malevolent suggests deep and lasting dislike, malicious usually means petty and spiteful. Malicious gossipers are often simply envious of a neighbor's good fortune. Vandals may take malicious pleasure in destroying and defacing property but usually don't truly hate the owners. Malice is an important legal concept, which has to be proved in order to convict someone of certain crimes such as first-degree murder.

Examples of malicious in a Sentence

… she is an inspired hater, and thrills to malicious descriptions of long-forgotten, nameless individuals whose bad luck it was to live near her, or to have met her socially. Joyce Carol Oates, New York Times Book Review, 5 Nov. 2000
A cunning and malicious crook who suckered him without half trying. Philip Roth, American Pastoral, 1997
Frank sensed her discomfort and took a certain malicious pleasure in it, enacting all the while his perfect innocence. John Updike, The Afterlife, 1994
a malicious distortion of the truth the neighborhood chatterbox has again been spreading malicious gossip
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.
The core challenge of adapting systems of trust to the agentic economy is distinguishing legitimate from malicious automation without harming the user experience. Andrew Sever, Forbes.com, 28 May 2026 The addition was a prompt injection, a form of AI attack that exploits an LLM’s inability to distinguish between legitimate user prompts and those from unauthorized, potentially malicious third parties. Dan Goodin, ArsTechnica, 28 May 2026 GitHub has had its share of security woes recently, including everything from massive leaks to people using the platform to spread malicious code. Alan Henry, PC Magazine, 22 May 2026 There have been other incidents in which promotion or the result of a knockout match have been overridden by off-field misdemeanours, but none were deliberate or malicious breaches. Jordan Campbell, New York Times, 21 May 2026 See All Example Sentences for malicious

Word History

Etymology

see malice

First Known Use

13th century, in the meaning defined above

Time Traveler
The first known use of malicious was in the 13th century

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Cite this Entry

“Malicious.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/malicious. Accessed 30 May. 2026.

Kids Definition

malicious

adjective
ma·​li·​cious mə-ˈlish-əs How to pronounce malicious (audio)
1
: doing mean things for pleasure
2
: done just to be mean
malicious gossip
maliciously adverb
maliciousness noun

Legal Definition

malicious

adjective
ma·​li·​cious mə-ˈli-shəs How to pronounce malicious (audio)
: given to, marked by, or arising from malice
malicious destruction of property
maliciously adverb
maliciousness noun

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