[ kuhn-jek-cher-uhl ]
/ kənˈdʒɛk tʃər əl /


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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for conjectural

British Dictionary definitions for conjectural


/ (kənˈdʒɛktʃərəl) /


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



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

Online Etymology Dictionary, © 2010 Douglas Harper