'Portent' definitions:

Definition of 'portent'

From: WordNet
noun
A sign of something about to happen; "he looked for an omen before going into battle" [syn: omen, portent, presage, prognostic, prognostication, prodigy]

Definition of 'Portent'

From: GCIDE
  • Portent \Por*tent"\ (?; 277), n. [L. portentum. See Portend.] That which portends, or foretoken; esp., that which portends evil; a sign of coming calamity; an omen; a sign. --Shak. [1913 Webster]
  • My loss by dire portents the god foretold. --Dryden. [1913 Webster]

Synonyms of 'portent'

From: Moby Thesaurus