a. 反常的, 乖戾的, 荒谬的, 首末倒置的

[ adj ]
incongruous;inviting ridicule
<adj.all>
the absurd excuse that the dog ate his homeworkthat's a cockeyed idea
ask a nonsensical question and get a nonsensical answer
a contribution so small as to be laughable
it is ludicrous to call a cottage a mansion
a preposterous attempt to turn back the pages of history
her conceited assumption of universal interest in her rather dull children was ridiculous

Preposterous \Pre*pos"ter*ous\, a. [L. praeposterus; prae before
+ posterus coming after, latter. See {Posterior}.]
1. Having that first which ought to be last; inverted in
order. [Obs.]

The method I take may be censured as preposterous,
because I thus treat last of the antediluvian earth,
which was first in the order of nature. --Woodward.

2. Contrary to nature or reason; not adapted to the end;
utterly and glaringly foolish; unreasonably absurd;
perverted. ``Most preposterous conclusions.'' --Shak.

Preposterous ass, that never read so far! --Shak.

Syn: Absurd; perverted; wrong; irrational; foolish;
monstrous. See {Absurd}.
※ -- {Pre*pos"ter*ous*ly}, adv.
-{Pre*pos"ter*ous*ness}, n.