the formation or expression of an opinion or theory without sufficient evidence for proof.
2.
an opinion or theory so formed or expressed; guess; speculation.
3.
Obsolete. the interpretation of signs or omens.
verb (used with object)
4.
to conclude or suppose from grounds or evidence insufficient to ensure reliability.
verb (used without object)
5.
to form conjectures.
Origin: 1350–1400; (noun) Middle English < Latinconjectūra (< 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 Englishconjecturen (< Middle French) < Late Latinconjecturāre, derivative of the noun
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
late 14c., from L. conjectura "conclusion, interpretation," from conjectus, pp. of conicere "to throw together," from com- "together" + jacere "to throw." Originally of interpretation of signs and omens; sense of "forming of opinion without proof" is 1530s.