English Lexicon

Illogical

/ɪˈlɒdʒ.ɪ.kəl/
adjectiveCEFR B2 (Upper)Top #1500 frequency
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Comprehensive Definitions & Senses

2 senses
As adjective
  1. 1

    Not making sense or lacking logical coherence.

    "His argument was illogical and failed to convince anyone."
  2. 2

    Contrary to the principles of logic.

    "The illogical conclusion drawn from the data was surprising."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

The term 'illogical' is derived from the prefix 'il-' meaning 'not' and 'logical', which comes from the Greek 'logikos', meaning 'of reason'. The word has evolved through Latin and Middle English, reflecting a shift from a simple negation of logic to a broader implication of irrationality.

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