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CONJECTURE, noun [Latin , See Conjector.]

1. Literally, a casting or throwing together of possible or probable events; or a casting of the mind to something future, or something past but unknown; a guess, formed on a supposed possibility or probability of a fact, or on slight evidence; preponderance of opinion without proof; surmise. We speak of future or unknown things by conjecture and of probable or unfounded conjectures.

2. Idea; notion.

CONJECTURE, verb transitive To guess; to judge by guess, or by the probability or the possibility of a fact, or by very slight evidence; to form an opinion at random. What will be the issue of a war, we may conjecture but cannot know. He conjectured that some misfortune had happened.