Illogical — Meaning, Definition & Synonyms

adjective /(ˌ)i(l)-ˈlä-ji-kəl/ il·log·i·cal

Meaning & Definition of Illogical

Illogical (adjective)

  1. not observing the principles of logic
  2. devoid of logic, senseless

Illogical (adjective) — Senses, Synonyms & Antonyms

  1. not using or following good reasoning

    "the illogical claim that playing basketball makes people taller because one sees so many tall players"

    "illogical people are likely to believe every sensational claim made on TV"

    similar: fallacious, illegitimate, inconsequent, inconsequential, invalid, irrational, nonrational, unreasonable, unreasoning, unsound, weak
    related: eristic, misleading, sophistic, specious, half-baked, ill-advised, misguided, unconsidered, unreasoned, inconsistent, absurd, asinine, foolish, meaningless, nonsensical, preposterous, reasonless, senseless, silly, Kafkaesque, odd, peculiar, strange, surreal, unusual, weird, insane, mad, nutty, wacky, disordered, disorganized, rambling, random, unconvincing, inexplicable, unaccountable, unexplainable
    opposite: logical, rational, reasonable, sound, valid, well-founded, well-grounded
    near: commonsense, sane, sensible, sober, wise, enlightened, informed, just, justified, reasoned, ordered, organized, clear, cogent, compelling, convincing, credible, persuasive, plausible, satisfying, solid, certain, sure, true, confirmed, corroborated, demonstrated, established, substantiated, validated

Synonyms, Thesaurus & Another Word for Illogical

The most common words with a similar meaning to Illogical:

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

Antonyms & Opposite Words for Illogical

Words with the opposite meaning of Illogical:

logical, rational, reasonable, sound, valid, well-founded, well-grounded

Related Words for Illogical

eristic, misleading, sophistic, specious, half-baked, ill-advised, misguided, unconsidered, unreasoned, inconsistent, absurd, asinine, foolish, meaningless, nonsensical, preposterous, reasonless, senseless, silly, Kafkaesque, odd, peculiar, strange, surreal, unusual, weird, insane, mad, nutty, wacky

Near Antonyms of Illogical

commonsense, sane, sensible, sober, wise, enlightened, informed, just, justified, reasoned, ordered, organized, clear, cogent, compelling, convincing, credible, persuasive, plausible, satisfying, solid, certain, sure, true, confirmed, corroborated, demonstrated, established, substantiated, validated

Word Forms of Illogical

Derived words: illogicality (noun), illogically (adverb), illogicalness (noun)

Origin & Etymology of Illogical

First known use: 1588

Frequently Asked Questions about Illogical

What does "Illogical" mean?

"Illogical" means not observing the principles of logic. As an adjective, it is defined as: not observing the principles of logic.

What is another word for "Illogical"?

Other words for "Illogical" include fallacious, illegitimate, inconsequent, inconsequential, invalid, irrational, nonrational and unreasonable. The best synonym depends on which meaning of "Illogical" you intend.

What are different ways to say "Illogical"?

There are 49 words and phrases with a similar meaning to "Illogical". Common alternatives include fallacious, illegitimate, inconsequent, inconsequential, invalid, irrational, nonrational, unreasonable, unreasoning and unsound.

What is the opposite of "Illogical"?

Antonyms of "Illogical" include logical, rational, reasonable, sound, valid, well-founded and well-grounded. Near antonyms include commonsense, sane, sensible and sober.

How do you use "Illogical" in a sentence?

Examples of "Illogical" in a sentence: "the illogical claim that playing basketball makes people taller because one sees so many tall players"; "illogical people are likely to believe every sensational claim made on TV".

Is "Illogical" a noun, verb, or adjective?

"Illogical" is an adjective.

How do you pronounce "Illogical"?

"Illogical" is pronounced /(ˌ)i(l)-ˈlä-ji-kəl/ and divided into syllables as il·log·i·cal.

What is the origin of the word "Illogical"?

First known use: 1588.