Dictionary.com
Thesaurus.com
Synonyms

defamation

American  
[def-uh-mey-shuhn] / ˌdɛf əˈmeɪ ʃən /

noun

  1. the act of defaming; false or unjustified injury of the good reputation of another, as by slander or libel; calumny.

    She sued the magazine for defamation of character.


defamation British  
/ ˌdɛfəˈmeɪʃən /

noun

  1. law the injuring of a person's good name or reputation Compare libel slander

  2. the act of defaming or state of being defamed

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Commonly Confused

See slander.

Etymology

Origin of defamation

First recorded in 1275–1325; Middle English; replacing (by analogy with defame ) Middle English diffamacioun, from Medieval Latin diffāmātiōn- (stem of diffāmātiō ), equivalent to Latin diffāmāt(us) (past participle of diffāmāre; defame ) + -iōn- noun suffix ( see -ion)

Explanation

Defamation is a dirty trick against someone's reputation. If you were so furious at your friend that you spread a rumor that he was still wetting his bed, that would be defamation of your friend. The noun defamation describes something very mean and completely deliberate, essentially a false accusation against someone or an attack on a person's good reputation. The terms libel and slander — written or spoken lies about a person, group, or business — both fall under the category of defamation. Sometimes defamation is even a punishable crime, and in every instance it's unkind and malicious.

Keep Reading on Vocabulary.com

Vocabulary lists containing defamation

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Media lawyers say the costs associated with defamation litigation have soared in recent years, as more lawsuits reach the discovery phase.

From The Wall Street Journal Jul. 24, 2026

Instead, it is refusing to repeat the legally actionable version of that claim that a defamation lawyer could put in front of a jury.

From Salon Jul. 22, 2026

A Sydney court dismissed on Wednesday a defamation case against Australian film star Rebel Wilson by another actor.

From Barron's Jul. 22, 2026

The Economist and the New York Times are among other foreign outlets that have been ordered to pay damages in defamation suits.

From BBC Jul. 14, 2026

Perhaps both of them would sue him, Abelman for character defamation and Lew for forgery.

From "A Confederacy of Dunces" by John Kennedy Toole

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training