illogical

1 of 2

adjective

il·​log·​i·​cal (ˌ)i(l)-ˈlä-ji-kəl How to pronounce illogical (audio)
Synonyms of illogical
1
: not observing the principles of logic
an illogical argument
2
: devoid of logic : senseless
illogical policies
illogicality
(ˌ)i(l)-ˌlä-jə-ˈka-lə-tē How to pronounce illogical (audio)
noun
illogically
(ˌ)i(l)-ˈlä-ji-k(ə-)lē How to pronounce illogical (audio)
adverb
illogicalness
(ˌ)i(l)-ˈlä-ji-kəl-nəs How to pronounce illogical (audio)
noun

illogicality

2 of 2

noun

il·​logicality (¦)i(l) How to pronounce illogicality (audio)
ə+
1
: illogic
the scientist rebels against the illogicality of such reasoning—J. M. Grant
2
: an instance of illogic : a piece of illogic
the book is full of illogicalities

Synonyms of illogical

Relevance

Adjective

See All Synonyms & Antonyms in Thesaurus

Examples of illogical in a Sentence

Adjective It is illogical to think that things will change on their own. the illogical claim that playing basketball makes people taller because one sees so many tall players
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.
Adjective
Lambasting Lambert for the performance is illogical, but so is placing so much importance on one player. — Chandler Rome, New York Times, 21 Aug. 2026 But Musgrove said Clancy lost a lot of weight during that time, struggled with her memory and became paranoid about illogical things. — Nicki Brown, CNN Money, 21 Aug. 2026 As presented in the Gang’s illogical scapegoating, fear-mongering, and overall manipulative self-exoneration, the debate turned into a farce. — Dennis Perkins, Entertainment Weekly, 28 July 2026 For instance, a sleep issue prompt yields varied advice depending on prior conversational context, occasionally making illogical leaps. — Lance Eliot, Forbes.com, 26 July 2026 See All Example Sentences for illogical

Word History

First Known Use

Adjective

1588, in the meaning defined at sense 1

Time Traveler
The first known use of illogical was in 1588

Rhymes for illogical

See All Rhymes for illogical

Browse Nearby Words

illogic
illogical
illogicality
See all Nearby Words

Cite this Entry

“Illogical.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/illogical. Accessed 1 Sep. 2026.

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Kids Definition

illogical

adjective
il·​log·​i·​cal (ˈ)il-ˈ(l)äj-i-kəl How to pronounce illogical (audio)
: not using or following good reasoning
illogically
-i-k(ə-)lē How to pronounce illogical (audio)
adverb
Last Updated: - Updated example sentences
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