ludicrous

First attested in 1619. From Latin lūdicrus, from lūdō (“play”).

• (Received Pronunciation) IPA^(key): /ˈluː.dɪ.kɹəs/, /ˈljuː.dɪ.kɹəs/
• (US) IPA^(key): /ˈluː.dɪ.kɹəs/

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ludicrous (comparative more ludicrous, superlative most ludicrous)

1. Idiotic or unthinkable, often to the point of being funny.
   • 1898, Winston Churchill, chapter 3, in The Celebrity:

     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.

   He made a ludicrous attempt to run for office.

2. Amusing by being plainly incongruous or absurd.
   • 1918, W. B. Maxwell, chapter 2, in The Mirror and the Lamp‎:

     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.

   • 2014, Paul Doyle, "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.

• (idiotic or unthinkable): laughable, ridiculous

• (idiotic or unthinkable): ludicrously, ludicrousness