Definition of reductio ad absurdissimum in English:

reductio ad absurdissimum

noun

rare
  • An extreme instance of reductio ad absurdum.

Origin

Mid 19th century; earliest use found in John Stuart Mill (1806–1873), philosopher, economist, and advocate of women's rights. From classical Latin reductiō reduction + ad to + absurdissimum, use as noun of absurdissimus, superlative of absurdus, after reductio ad absurdum.

Pronunciation

reductio ad absurdissimum

/rɪˌdʌktɪəʊ ad absəːˈdɪsɪməm/