supposititious Meaning, Definition & Usage

  1. adjective satellite based primarily on surmise rather than adequate evidence
    conjectural; suppositious; suppositional; supposed; hypothetical; hypothetic; divinatory.
    • theories about the extinction of dinosaurs are still highly conjectural
    • the supposed reason for his absence
    • suppositious reconstructions of dead languages
    • hypothetical situation

WordNet

Sup*pos`i*ti"tious adjective
Etymology
L. suppositicus. See Supposition.
Definitions
  1. Fraudulently substituted for something else; not being what is purports to be; not genuine; spurious; counterfeit; as, a supposititious child; a supposititious writing. Bacon.
  2. Suppositional; hypothetical. R. Woodward. -- Sup*pos`i*ti"tious*ly, adv. -- Sup*pos`i*ti"tious*ness, n.

Webster 1913