not sensible or thought out in a logical way illogical behavior/arguments She has an illogical fear of insects. opposite logical
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NAmE//ɪˌlɑdʒɪˈkælət̮i//
noun [uncountable, countable] NAmE//ɪˈlɑdʒɪkli//
adverb She felt illogically happy when she heard the news.See illogical in the Oxford Advanced Learner's DictionaryCheck pronunciation: illogical