Adjective

(en adjective)

Idiotic or unthinkable, often to the point of being funny.

*

, title=(The Celebrity), chapter=3 , passage=Now all this was very fine, but not at all in keeping with the Celebrity's character as I had come to conceive it. The idea that adulation ever cloyed on him was ludicrous in itself. In fact I thought the whole story fishy, and came very near to saying so.}}

Amusing by being plainly incongruous or absurd.

* 2014 , , " Southampton hammer eight past hapless Sunderland in barmy encounter", The Guardian , 18 October 2014:

Five minutes later, Southampton tried to mount their first attack, but Wickham sabotaged the move by tripping the rampaging Nathaniel Clyne, prompting the referee, Andre Marriner, to issue a yellow card. That was a lone blemish on an otherwise tidy start by Poyet’s team – until, that is, the 12th minute, when Vergini produced a candidate for the most ludicrous own goal in Premier League history.

* , title=The Mirror and the Lamp

, chapter=2 citation , passage=She was a fat, round little woman, richly apparelled in velvet and lace, […]; and the way she laughed, cackling like a hen, the way she talked to the waiters and the maid, […]—all these unexpected phenomena impelled one to hysterical mirth, and made one class her with such immortally ludicrous types as Ally Sloper, the Widow Twankey, or Miss Moucher.}}

Adjective

(en adjective)

Exhibiting unsoundness or disorder of mind; not sane; mad; deranged in mind; delirious; distracted.

* '>citation

What is the cause of insanity?
Nobody can answer such a sweeping question as that,
but we know that certain diseases, such as syphilis, break
down and destroy the brain cells and result in insanity. In
fact, about one-half of all mental diseases can be attributed
to such physical causes as brain lesions, alcohol, toxins,
and injuries. But the other half—and this is the appalling
part of the story—the other half of the people who go in-
sane' apparently have nothing organically wrong with
their brain cells. In post-mortem examinations, when their
brain tissues are studied under the highest-powered micro-
scopes, they are found to be apparently just as healthy as
yours and mine.
Why do these people go ' insane ?

Used by, or appropriated to, insane persons; as, an insane hospital.

Causing insanity or madness.

Characterized by insanity or the utmost folly; chimerical; unpractical; as, an insane plan, attempt, etc.

* , chapter=16

, title= The Mirror and the Lamp , passage=The preposterous altruism too!