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Meaning of hypothesis

hy•poth•e•sis

Pronunciation: (hī-poth'u-sis, hi-), [key]
— pl. -ses
  1. a proposition, or set of propositions, set forth as an explanation for the occurrence of some specified group of phenomena, either asserted merely as a provisional conjecture to guide investigationor accepted as highly probable in the light of established facts.
  2. a proposition assumed as a premise in an argument.
  3. the antecedent of a conditional proposition.
  4. a mere assumption or guess.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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