The Collaborative International Dictionary of English v.0.48:

Augur \Au"gur\, v. i. [imp. & p. p. Augured; p. pr. & vb. n.
   Auguring.]
   1. To conjecture from signs or omens; to prognosticate; to
      foreshow.
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            My auguring mind assures the same success. --Dryden.
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   2. To anticipate, to foretell, or to indicate a favorable or
      an unfavorable issue; as, to augur well or ill.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Augur \Au"gur\, v. t.
   To predict or foretell, as from signs or omens; to betoken;
   to presage; to infer.
   [1913 Webster]

         It seems to augur genius.                --Sir W.
                                                  Scott.
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         I augur everything from the approbation the proposal
         has met with.                            --J. F. W.
                                                  Herschel.
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   Syn: To predict; forebode; betoken; portend; presage;
        prognosticate; prophesy; forewarn.
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The Collaborative International Dictionary of English v.0.48:

Augur \Au"gur\, n. [L. Of uncertain origin: the first part of
   the word is perh. fr. L. avis bird, and the last syllable,
   gur, equiv. to the Skr. gar to call, akin to L. garrulus
   garrulous.]
   1. (Rom. Antiq.) An official diviner who foretold events by
      the singing, chattering, flight, and feeding of birds, or
      by signs or omens derived from celestial phenomena,
      certain appearances of quadrupeds, or unusual occurrences.
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   2. One who foretells events by omens; a soothsayer; a
      diviner; a prophet.
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            Augur of ill, whose tongue was never found
            Without a priestly curse or boding sound. --Dryden.
      [1913 Webster]

WordNet (r) 3.0 (2006):

augur
    n 1: (ancient Rome) a religious official who interpreted omens
         to guide public policy [syn: augur, auspex]
    v 1: indicate by signs; "These signs bode bad news" [syn:
         bode, portend, auspicate, prognosticate, omen,
         presage, betoken, foreshadow, augur, foretell,
         prefigure, forecast, predict]
    2: predict from an omen

Moby Thesaurus II by Grady Ward, 1.0:

72 Moby Thesaurus words for "augur":
   Cassandra, Druid, adumbrate, argue, astrologer, bespeak, betoken,
   bid fair to, bode, calamity howler, crystal gazer, divinator,
   divine, diviner, divineress, forebode, forecast, forecaster,
   foreknower, foreseer, foreshadow, foreshow, foreshower, foreteller,
   foretoken, fortuneteller, geomancer, haruspex, hint, imply,
   indicate, intimate, mean, omen, palmist, point to, portend,
   predict, predictor, prefigure, prefigurer, preindicate, presage,
   presager, presign, presignal, presignify, pretypify, prognosticate,
   prognosticator, promise, prophesier, prophesy, prophet,
   prophet of doom, prophetess, psychic, pythoness,
   religious prophets, seer, seeress, shadow forth, signify, soothsay,
   soothsayer, spell, suggest, token, typify, vates, vaticinate,
   weather prophet