illogical

adjective

il·​log·​i·​cal (ˌ)i(l)-ˈlä-ji-kəl 

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 

noun

illogically

(ˌ)i(l)-ˈlä-ji-k(ə-)lē 

adverb

illogicalness

(ˌ)i(l)-ˈlä-ji-kəl-nəs 

noun

Synonyms

• fallacious
• illegitimate
• inconsequent
• inconsequential
• invalid
• irrational
• nonrational
• unreasonable
• unreasoning
• unsound
• weak

Examples of illogical in a Sentence

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

Completely illogical, but all the better for it, is the first product of that collaboration. —Brett Berk, Architectural Digest, 24 June 2024

We are now effectively held hostage by a bunch of people who have been manipulated by an illogical reading of the Constitution, a bankrupt lobbying group, money-grubbing politicians, and a vast right-wing media empire into being terrified for no reason. —Letters To The Editor, The Mercury News, 17 June 2024

The faux semantic debate in right-wing media over these terms thus appears to rely, purposely or not, on an illogical conflation of the two words. —Voice Of The People, New York Daily News, 16 June 2024

The figures careen into and away from one another like clockwork and destiny at once, leading to an assembly line of experience for the nameless forms – at times brutal, illogical and dystopic. —Holly Jones, Variety, 15 June 2024

Word History

First Known Use

1588, in the meaning defined at sense 1

Kids Definition

illogical

adjective

il·​log·​i·​cal (ˈ)il-ˈ(l)äj-i-kəl 

: not using or following good reasoning

illogically

-i-k(ə-)lē 

adverb