Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Latin
Origin: ludicrus 'playful', from ludus 'play'

ludicrous

 adjective
     
lu‧di‧crous
completely unreasonable, stupid, or wrong [= ridiculous]:
It is ludicrous to suggest that I was driving under the influence of alcohol.
The court granted him the ludicrous sum of £100 in damages.
That's a ludicrous idea.
—ludicrously adverb:
a ludicrously inadequate army
—ludicrousness noun [uncountable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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