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1. A hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence)
   "he dismissed it as mere conjecture";
   - speculation
    
2. A message expressing an opinion based on incomplete evidence
   - guess, supposition, surmise, surmisal, speculation, hypothesis
    
3. Reasoning that involves the formation of conclusions from incomplete evidence

1. To believe especially on uncertain or tentative grounds
   "Scientists conjectured that large dinosaurs lived in swamps";
   - speculate, theorize, theorise [Brit], hypothesize, hypothesise [Brit], hypothecate, suppose

Derived forms: conjectured, conjectures, conjecturing

Type of: abstract thought, anticipate, expect, hypothesis, logical thinking, opinion, possibility, reasoning, theory, view

Encyclopedia: Conjecture