Superlative form of absurd: most absurd.(adjective)
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Use "absurdest" in a sentence
"What Walpole calls the absurdest passages are precisely those which possess most interest for posterity; namely, the minute personal details, which bring Johnson home to the mind's eye."
"The mightiest and absurdest sleep-walker on the planet!"
"The absurdest humor and snappy dialog really give this story a voice all its own."