adj. 25B6; adjective
her nonsensical way of talking : MEANINGLESS, senseless, illogical.
a nonsensical generalization : FOOLISH, insane, stupid, idiotic, illogical, irrational, senseless, absurd, silly, inane, hare-brained, ridiculous, ludicrous, preposterous; informal crazy, crackpot, nutty; Brit. informal daft.
logical, sensible.