Not logical; devoid of or contrary to logic; ignorant or negligent of the principles of sound reasoning.

Contrary or opposed to logic; illogical; not based upon reason or sound judgement. More neutrally: (Philosophy and Psychology) not determined or…

Not characterized by or involving logic; illogical.

(un-, prefix1 affix 1.)

Poorly adapted, unsuitable, or inappropriate for a particular purpose; back-to-front.

Not involving or proceeding from logic; spec. = material, adj. 5.

Usually in form back-to-front. Chiefly predicative. Reversed from the usual or correct position or order; (esp. of clothing) that has the back…

Contrary to what is usual, expected, or logical; back-to-front, muddled, perverse; = ass-backwards, adj.

Contrary to what is usual, expected, or logical; back-to-front, muddled, perverse; = ass-backwards, adj.

Contrary to what is usual, expected, or logical; back-to-front, muddled, perverse.

Of a person: scatter-brained; driven distracted, mad; of a story, etc.: illogical and absurd.

Contrary to what is usual, expected, or logical; back-to-front, muddled, perverse; = ass-backwards, adj. Cf. bass-ackwards, adj.

Contrary to what is usual, expected, or logical; back-to-front, muddled, perverse; = ass-backwards, adj.