\Con*spir"a*cy\, n.; pl. {Conspiracies}. [See
{Conspiration}.]
1. A combination of men for an evil purpose; an agreement,
   between two or more persons, to commit a crime in concert,
   as treason; a plot.
         When shapen was all his conspiracy From point to
         point.                                --Chaucer.
         They made a conspiracy against [Amaziah]. --2 Kings
                                               xiv. 19.
         I had forgot that foul conspiracy
         Of the beast Caliban and his confederates. --Shak.
2. A concurence or general tendency, as of circumstances, to
   one event, as if by agreement.
         A conspiracy in all heavenly and earthly things.
                                               --Sir P.
                                               Sidney.
3. (Law) An agreement, manifesting itself in words or deeds,
   by which two or more persons confederate to do an unlawful
   act, or to use unlawful to do an act which is lawful;
   confederacy.
Syn: Combination; plot; cabal.