[ kuhn-jek-cher ]
/ kənˈdʒɛk tʃər /


the formation or expression of an opinion or theory without sufficient evidence for proof.
an opinion or theory so formed or expressed; guess; speculation.
Obsolete. the interpretation of signs or omens.

verb (used with object), con·jec·tured, con·jec·tur·ing.

to conclude or suppose from grounds or evidence insufficient to ensure reliability.

verb (used without object), con·jec·tured, con·jec·tur·ing.

to form conjectures.



How well do you know your adjectives from your adverbs? Your preposition from your pronouns? Your interjections from your conjunctions? Let’s put your knowledge of parts of speech to the text! Note: Many of the following questions will ask you to identify the parts of speech “in order.” That means the first word in all capital letters will correspond to the first option in an answer, and so on.
Question 1 of 10
In order, what parts of speech are the words in all capital letters? Alisa was VERY tired, SO she decided to go to bed.

Origin of conjecture

1350–1400; (noun) Middle English < Latin conjectūra (< Middle French) inferring, reasoning, equivalent to conject(us) past participle of conjicere to throw together, form a conclusion (con- con- + -jicere, combining form of jacere to throw) + -ūra -ure; (v.) late Middle English conjecturen (< Middle French) < Late Latin conjecturāre, derivative of the noun

OTHER WORDS FROM conjecture Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for conjecture

British Dictionary definitions for conjecture

/ (kənˈdʒɛktʃə) /


the formation of conclusions from incomplete evidence; guess
the inference or conclusion so formed
obsolete interpretation of occult signs


to infer or arrive at (an opinion, conclusion, etc) from incomplete evidence

Derived forms of conjecture

conjecturable, adjectiveconjecturably, adverbconjecturer, noun

Word Origin for conjecture

C14: from Latin conjectūra an assembling of facts, from conjicere to throw together, from jacere to throw
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