conjecture > define

noun

• A hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence. )
  • usage: "speculations about the outcome of the election"; "he dismissed it as mere conjecture"
  • synonyms: speculation
• A message expressing an opinion based on incomplete evidence.
  • synonyms: guess, supposition, surmise, surmisal, speculation, hypothesis
• Reasoning that involves the formation of conclusions from incomplete evidence.

verb

• To believe especially on uncertain or tentative grounds.
  • usage: "Scientists supposed that large dinosaurs lived in swamps"
  • synonyms: speculate, theorize, theorise, hypothesize, hypothesise, hypothecate, suppose

• (n.) An opinion or judgment, formed on defective or presumptive evidence; probable inference; surmise; guess; suspicion.
• (v.t.) To arrive at by conjecture; to infer on slight evidence; to surmise; to guess; to form, at random, opinions concerning.
• (v.i.) To make conjectures; to surmise; to guess; to infer; to form an opinion; to imagine.