characterized by lack of logic; senseless or unreasonable disregarding logical principles
WordReference Random House Learner's Dictionary of American English © 2025
il•log•i•cal /ɪˈlɑdʒɪkəl/USA pronunciation
adj.
WordReference Random House Unabridged Dictionary of American English © 2025- not logical;
unreasoning:an illogical reply.
il•log•i•cal
(i loj′i kəl),USA pronunciation adj.
il•log′i•cal•ly, adv.
il•log′i•cal•ness, n.
- not logical;
contrary to or disregardful of the rules of logic;
unreasoning:an illogical reply.
- il-2 + logical 1580–90
il•log′i•cal•ness, n.
- unsound, absurd, preposterous.
Collins Concise English Dictionary © HarperCollins Publishers::
'illogical' also found in these entries (note: many are not synonyms or translations):
Catch-22
- IL
- Irish
- absurd
- addlebrained
- balderdash
- cart
- conversational implicature
- don't
- fallacious
- ill-founded
- illogic
- illogicality
- inconsequent
- inconsequential
- irrational
- irrationality
- lateral thinking
- mixed metaphor
- non sequitur
- weak