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What is the opposite of “logic”?


Notes from a Native English Speaker

Antonym: An antonym is a word opposite in meaning to another word. By familiarizing yourself with the opposite meaning of words, you can add more variety to your descriptions and better understand written texts. Plus, knowing antonyms can help you communicate accurately and emphasize contrasting points in discussions and when expressing your opinions. So, get to know opposites and improve your English skills today!

What is the antonym of “logic”?

The antonyms of logic are illogic and irrationality. The antonyms illogic and irrationality convey a lack of reason, coherence, or sound judgment.

Brief Definitions of the Antonym(s)

Learn when and how to use these words with these examples!

Lack of logic or reason; irrationality.


His argument was full of illogic and fallacies.

Lack of reason or sound judgment; illogical or unreasonable behavior.


Her decision to quit her job without a backup plan was an act of irrationality.

How are these antonyms different from each other?

  • 1Illogic refers to the absence of logical reasoning or coherence.
  • 2Irrationality refers to the lack of sound judgment or reasonableness.

Good things to know

  • 1Enhance Critical Thinking: Use these antonyms to identify flawed arguments or reasoning.
  • 2Improve Decision Making: Incorporate these antonyms to evaluate the pros and cons of different options.
  • 3Enrich Writing: Utilize these antonyms in essays or articles to express contrasting viewpoints or perspectives.

Remember this!

The antonyms of logic are illogic and irrationality. Use these words to enhance critical thinking, improve decision-making, and enrich writing by expressing contrasting viewpoints or perspectives.

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