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4 definitions found
 for probability
From The Collaborative International Dictionary of English v.0.48 :

  Probability \Prob`a*bil"i*ty\, n.; pl. Probabilities. [L.
     probabilitas: cf. F. probabilit['e].]
     [1913 Webster]
     1. The quality or state of being probable; appearance of
        reality or truth; reasonable ground of presumption;
        likelihood.
        [1913 Webster]
  
              Probability is the appearance of the agreement or
              disagreement of two ideas, by the intervention of
              proofs whose connection is not constant, but appears
              for the most part to be so.           --Locke.
        [1913 Webster]
  
     2. That which is or appears probable; anything that has the
        appearance of reality or truth.
        [1913 Webster]
  
              The whole life of man is a perpetual comparison of
              evidence and balancing of probabilities.
                                                    --Buckminster.
        [1913 Webster]
  
              We do not call for evidence till antecedent
              probabilities fail.                   --J. H.
                                                    Newman.
        [1913 Webster]
  
     3. (Math.) Likelihood of the occurrence of any event in the
        doctrine of chances, or the ratio of the number of
        favorable chances to the whole number of chances,
        favorable and unfavorable. See 1st Chance, n., 5.
        [1913 Webster]
  
     Syn: Likeliness; credibleness; likelihood; chance.
          [1913 Webster]

From WordNet (r) 3.0 (2006) :

  probability
      n 1: a measure of how likely it is that some event will occur; a
           number expressing the ratio of favorable cases to the whole
           number of cases possible; "the probability that an unbiased
           coin will fall with the head up is 0.5" [syn:
           probability, chance]
      2: the quality of being probable; a probable event or the most
         probable event; "for a while mutiny seemed a probability";
         "going by past experience there was a high probability that
         the visitors were lost" [ant: improbability,
         improbableness]

From Moby Thesaurus II by Grady Ward, 1.0 :

  187 Moby Thesaurus words for "probability":
     a thing for, accidentality, actuarial calculation,
     actuarial prediction, adventitiousness, affinity, aftertime,
     afteryears, anticipation, apocalypse, aptitude, aptness,
     bare possibility, bent, best bet, bias, break, by-and-by, cast,
     casualness, certainty, chance, chances, conatus, conceivability,
     conceivableness, conduciveness, confidence, contemplation,
     contingency, course ahead, crystal ball, delight, destiny,
     determinism, diathesis, disposition, distant future, eagerness,
     even chance, eventuality, expectancy, expectation, fate,
     favorable prospect, feeling for, flukiness, foreboding, forecast,
     forecasting, foreshowing, foresight, foretelling, fortuitousness,
     fortuity, fortune, forward look, future, future tense, futurism,
     futurity, gamble, good chance, good fortune, good luck,
     good opportunity, good possibility, guesswork, hap, happenstance,
     happy chance, heedless hap, hereafter, hope, how they fall,
     immediate future, immediate prospect, imminence, improbability,
     inclination, indeterminacy, indeterminateness, law of averages,
     leaning, liability, liableness, likelihood, likeliness, liking,
     lot, luck, main chance, moira, near future, obligation, odds,
     odds-on, odds-on chance, off chance, offing, omen, opportunity,
     outlook, outside chance, outside hope, penchant, possibility,
     possibleness, posteriority, potential, potentiality, prediction,
     predilection, predisposition, prefiguration, prefigurement,
     prefiguring, prejudice, presage, presaging, presentiment,
     preshowing, presignifying, presumption, principle of indeterminacy,
     problematicness, proclivity, prognosis, prognostication, project,
     promise, proneness, propensity, prophecy, prophesying, prospect,
     prospectus, random sample, readiness, reliance, remote possibility,
     risk, run of luck, sensitivity to, serendipity, small hope,
     soft spot, soothsay, speculation, sporting chance,
     statistical prediction, statistical probability, sure bet,
     sure thing, susceptibility, tendency, the attainable, the breaks,
     the feasible, the future, the morrow, the possible,
     the sweet by-and-by, theory of probability, thinkability,
     thinkableness, thought, time ahead, time just ahead, time to come,
     tomorrow, tropism, turn, twist, unastonishment, uncertainty,
     uncertainty principle, vaticination, virtuality, warp, weakness,
     well-grounded hope, what is possible, what may be, what might be,
     whatever comes, willingness
  
  

From Bouvier's Law Dictionary, Revised 6th Ed (1856) :

  PROBABILITY. That which is likely to happen; that which is most consonant to 
  reason; for example, there is a strong probability that a man of a good 
  moral character, and who has heretofore been remarkable for truth, will, 
  when examined as a witness under oath, tell the truth; and, on the contrary, 
  that a man who has been guilty of perjury, will not, under the same 
  circumstances, tell the truth; the former will, therefore, be entitled to 
  credit, while the latter will not. 
  
  

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