'conspiratorial' definitions:

Definition of 'conspiratorial'

From: WordNet
adjective
Relating to or characteristic of conspiracy or conspirators; "a conspiratorial whisper"; "the discovery of possible conspirative codes" [syn: conspiratorial, conspirative]

Definition of 'conspiratorial'

From: GCIDE
  • conspiratorial \conspiratorial\ adj. relating to or characteristic of conspiracy or conspirators; as, a conspiratorial whisper.
  • Syn: conspirative. [WordNet 1.5]