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Synonyms

antithetical

American  
[an-tuh-thet-i-kuhl] / ˌæn təˈθɛt ɪ kəl /
Archaic, antithetic

adjective

  1. of the nature of or involving antithesis.

  2. directly opposed or contrasted; opposite.


antithetical British  
/ ˌæntɪˈθɛtɪkəl /

adjective

  1. of the nature of antithesis

  2. directly contrasted

"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

Other Word Forms

Etymology

Origin of antithetical

First recorded in 1575–85; from Greek antithetikós “setting in opposition, contrasting” (from antíthetos “opposed”) + -al; see origin at antithesis ( def. ), -tic ( def. ), -al 1 ( def. ).

Explanation

Something is antithetical when it is in complete and utter opposition to the character of something. If you’re a vegetarian, eating giant T-bone steaks is antithetical to your beliefs. You’ll find that antithetical is a useful word when you’re trying to express an extreme contrast. If someone is trying to convince you to do something you don’t believe in, or to allow an organization you’re involved with to adopt measures you are strongly against, you can use antithetical. You go out to vote because sitting out of the voting process is antithetical to what you believe in. If you find that your club wants to adopt exclusive measures when it is supposed to be open, you'll tell them that that's antithetical to the club's purpose.

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Vocabulary lists containing antithetical

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.

For Christina Lila Wilson, 39, who spent her summers in West L.A. with Iranian relatives until she moved as a teenager, the U.S. treatment of the team is antithetical to her cultural values.

From Los Angeles Times • Jun. 14, 2026

Meanwhile, Ava rises to captain her own sitcom ship, commanding this one with joy and gratitude, having learned that fear is antithetical to producing one’s best work.

From Salon • May 29, 2026

These examples are Orwellian in nature and couldn’t be more antithetical to a society that values freedom of expression.

From The Wall Street Journal • Apr. 21, 2026

"Their approach to the lives of others is antithetical to the values of welcoming and fair debate that our society has upheld for 177 years," the society said.

From BBC • Feb. 10, 2026

Thomas Kuhn thought that science and technology were antithetical to each other, at least until the 1870s.

From "The Invention of Science" by David Wootton

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