• WordNet 3.6
    • adj supposititious based primarily on surmise rather than adequate evidence "theories about the extinction of dinosaurs are still highly conjectural","the supposed reason for his absence","suppositious reconstructions of dead languages","hypothetical situation"
    • ***
Webster's Revised Unabridged Dictionary
    • Supposititious Fraudulently substituted for something else; not being what is purports to be; not genuine; spurious; counterfeit; as, a supposititious child; a supposititious writing.
    • Supposititious Suppositional; hypothetical.
    • ***
Century Dictionary and Cyclopedia
    • supposititious Put by artifice in the place of or assuming the character of another; not genuine; counterfeit; spurious.
    • supposititious Hypothetical; supposed.
    • supposititious Synonyms Counterfeit, etc. See spurious.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Supposititious sup-poz-i-tish′us put by trick in the place of another: spurious: imaginary, hypothetical, supposed
    • ***


Webster's Revised Unabridged Dictionary
L. suppositicus,. See Supposition
Chambers's Twentieth Century Dictionary
L. supposititiussupponĕre, to put in the place of another—sub, under, ponĕre, to place.


In literature:

He affects to doubt whether the plot which then made so much noise was real or supposititious.
"Political Women (Vol. 1 of 2)" by Sutherland Menzies
Argument is at an end when supposititious miracle is introduced.
"The Testimony of the Rocks" by Hugh Miller
One man only shared this supposititious knowledge with me.
"Christopher Hibbault, Roadmaker" by Marguerite Bryant
I prefer to adopt this belief, and so keep the character of even a supposititious God above reproach.
"Men, Women, and Gods" by Helen H. Gardener
It thus had a definite, supposititious beginning.
"Carmen Ariza" by Charles Francis Stocking
Her brother Alfonso had recently died, and Joanna, the daughter of Henry, was believed by the people to be a supposititious offspring.
"Lives of Celebrated Women" by Samuel Griswold Goodrich
A supposititious child, the destruction of a registry of decease; a criminal act, indeed!
"The Mysteries of Paris, Volume 3 of 6" by Eugène Sue
The portraits of Bonarruoti ascribed to his own hand, are also, in my opinion, supposititious.
"The History of Painting in Italy, Vol. 1 (of 6)" by Luigi Antonio Lanzi
Two or three dogs chased each other and supposititious partridges from tuft to tuft.
"The Pursuit" by Frank (Frank Mackenzie) Savile
Chorus girls are wholly supposititious.
"In the Onyx Lobby" by Carolyn Wells
She is more than welcome to retort upon him with her supposititious husband.
"Doctor Cupid" by Rhoda Broughton
The Acts of Peter, a work equally supposititious.
"A Philosophical Dictionary, Volume 1 (of 10)" by François-Marie Arouet (AKA Voltaire)
But the contents of the supposititious book were very soothing and acceptable.
"True and Other Stories" by George Parsons Lathrop
Let us, in imagination, adjust the speed of a supposititious motor until we get that which corresponds to 100 alternations.
"Marvels of Scientific Invention" by Thomas W. Corbin
As a supposititious Prince von Gramberg I was absolutely impossible as a suitor for Minna's hand.
"A Dash .. .. .. For a Throne" by Arthur W. Marchmont
She remembered certainly that it was closed when she had gone upstairs for her supposititious fan.
"Under Cover" by Roi Cooper Megrue
Bora, too, would loudly declare that Barbara was a supposititious child brought forward to deprive him of the throne.
"The Shadow of the Czar" by John R. Carling
We have read of the supposititious births of Princes, but where are the evidences of this first Birth?
"The Works of Charles and Mary Lamb" by Charles Lamb
One can't both wonder and like at a time; your men with two heads are always either supposititious or disgusting.
"Self-control" by Mary Brunton
He examined Mademoiselle Chichette and the supposititious outraged husband, who acted as if he wished to crawl under the table.
"The Bashful Lover (Novels of Paul de Kock Volume XIX)" by Charles Paul de Kock

In news:

I like to talk to my supposititious friend because he agrees with all I have to say.