suppositious

Adjective

suppositious (comparative more suppositious, superlative most suppositious)

1. Spurious; substituted for the genuine, counterfeit; fake.
   • […] who knowes not how false, how suppositious, the writings and Epistles of the auncient Popes are iustly esteemed?1616, James I of England, A Remonstrance of the Most Gratious King James I, Cambridge, page 22
   • […] a hen teaches this language with equal ease to the ducklings, she has hatched from suppositious eggs, and educates as her own offspring […]1794, Erasmus Darwin, Zoonomia, London: J. Johnson, Volume 1, Section 16.9, p. 154
2. Imaginary; fictitious, pretended to exist.
   • At rehearsals the actor tossed an entirely imaginary cloak about his shoulders as though it were heavy brocade, courteously removed a hat made of air, and seriously set out on a suppositious table a non-existent dinner, after sedulously cooking it on a kitchen range that was a chair.1940, Sinclair Lewis, chapter 14, in Bethel Merriday
3. Hypothetical, based on supposition; conjectural.
   • Near-synonyms: assumed, presumed, presumptive, putative, supposed; apparent, likely
   • Look, Dr. Lanning, let me present you with a suppositious case. Supposing we had a politician who was interested in defeating a reform candidate at any cost and while investigating his private life came across oddities such as I have just mentioned.1946 September, Isaac Asimov, “Evidence”, in Astounding Science-Fiction, volume 38, number 1, page 125

   Synonyms:

   suppositional, assumed, presumed, presumptive, putative, supposed, apparent, likely