• IPA: /ˌvæ.ljuːˈeɪ.ʃən/


  1. An estimation of something's worth.
  2. (finance, insurance) The process of estimating the value of a financial asset or liability.
    • 1993, Historic American Building Survey, Town of Clayburg: Refractories Company Town, National Park Service, page 4:
      The tax assessor put them in fourteen valuation groups ranging from one two-story brick house and two one-and-a-half-story houses to the largest groups of eighteen two-story houses and twenty-four one-story bungalows.
  3. (logic, propositional logic, model theory) An assignment of truth values to propositional variables, with a corresponding assignment of truth values to all propositional formulas with those variables (obtained through the recursive application of truth-valued functions corresponding to the logical connectives making up those formulas).
  4. (logic, first-order logic, model theory) A structure, and the corresponding assignment of a truth value to each sentence in the language for that structure.
  5. (algebra) A measure of size or multiplicity.
  6. (measure theory, domain theory) A map from the class of open sets of a topological space to the set of positive real numbers including infinity.
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