conjectural

[kuhn-jek-cher-uhl]

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adjective

of, of the nature of, or involving conjecture; problematical: Theories about the extinction of dinosaurs are highly conjectural.
given to making conjectures: a conjectural thinker.

Origin of conjectural

1545–55; < Latin conjectūrālis, equivalent to conjectūr(a) conjecture + -ālis -al¹

Related formscon·jec·tur·al·ly, adverbun·con·jec·tur·al, adjective

Synonyms for conjectural

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1. speculative, theoretical, doubtful.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for conjectural

academic, assumed, doubtful, hypothetical, putative, reputed, supposed, suspect, tentative, theoretical, uncertain, unresolved, suppositional, suppositious, suppositive, figured

Examples from the Web for conjectural

Historical Examples of conjectural

"Why—" Her eyes clouded; she pursed her lips over the conjectural annoyance.
The Black Bag
Louis Joseph Vance
As for ourselves, we merely indulge in a piece of conjectural criticism.
Leading Articles on Various Subjects
Hugh Miller
It is conjectural astronomy, conjectural natural philosophy, conjectural medicine.
Timaeus
Plato
Singer's conjectural reading is that; but and seems to me to be the word required.
Shakespeare Jest-Books;
Unknown
But there is no need to resort to circumstantial or conjectural evidence.
The Story of the Upper Canada Rebellion, Volume 1
John Charles Dent

British Dictionary definitions for conjectural

conjectural

adjective

involving or inclined to conjecture

Derived Formsconjecturally, adverb

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for conjectural

adj.

1550s, from Latin conjecturalis "belonging to conjecture," from conjectura (see conjecture). Related: Conjecturally (mid-15c.).