Antonyms of adj logical

4 senses of logical

Sense 1
logical (vs. illogical) -- (capable of or reflecting the capability for correct and valid reasoning; "a logical mind")

illogical (vs. logical), unlogical -- (lacking in correct logical relation)
        => absurd -- (inconsistent with reason or logic or common sense; "the absurd predicament of seeming to argue that virtue is highly desirable but intensely unpleasant"- Walter Lippman)
        => inconsequential -- (not following logically as a consequence)
        => intuitive, nonrational, visceral -- (obtained through intuition rather than from reasoning or observation)

Sense 2
legitimate, logical -- (based on known statements or events or conditions; "rain was a logical expectation, given the time of year")

INDIRECT (VIA valid) -> invalid -- (having no cogency or legal force; "invalid reasoning"; "an invalid driver's license")

Sense 3
coherent (vs. incoherent), consistent, logical, ordered -- (marked by an orderly, logical, and aesthetically consistent relation of parts; "a coherent argument")


Sense 4
coherent, logical, lucid -- (capable of thinking and expressing yourself in a clear and consistent manner; "a lucid thinker"; "she was more coherent than she had been just after the accident")

INDIRECT (VIA rational) -> irrational -- (not consistent with or using reason; "irrational fears"; "irrational animals")

Similarity of adj logical

4 senses of logical

Sense 1
logical (vs. illogical) -- (capable of or reflecting the capability for correct and valid reasoning; "a logical mind")
       => dianoetic, discursive -- (proceeding to a conclusion by reason or argument rather than intuition)
       => formal -- (logically deductive; "formal proof")
       => ratiocinative -- (based on exact thinking; "one's ratiocinative powers")
          Also See-> analytic#4, analytical#2; coherent#1, consistent#3, logical#3, ordered#3; synthetic#4, synthetical#2; rational#1; reasonable#1, sensible#1

Sense 2
legitimate, logical -- (based on known statements or events or conditions; "rain was a logical expectation, given the time of year")
       => valid (vs. invalid) -- (well grounded in logic or truth or having legal force; "a valid inference"; "a valid argument"; "a valid contract")

Sense 3
coherent (vs. incoherent), consistent, logical, ordered -- (marked by an orderly, logical, and aesthetically consistent relation of parts; "a coherent argument")
       => seamless -- (perfectly consistent and coherent; "the novel's seamless plot")
          Also See-> logical#1; rational#1

Sense 4
coherent, logical, lucid -- (capable of thinking and expressing yourself in a clear and consistent manner; "a lucid thinker"; "she was more coherent than she had been just after the accident")
       => rational (vs. irrational) -- (consistent with or based on or using reason; "rational behavior"; "a process of rational inference"; "rational thought")