n.; pl. Conspiracies [ See Conspiration. ] 1. A combination of people for an evil purpose; an agreement, between two or more persons, to commit a crime in concert, as treason; a plot. [ 1913 Webster ]

When shapen was all his conspiracy
From point to point. Chaucer. [ 1913 Webster ]

They made a conspiracy against [ Amaziah ]. 2 Kings xiv. 19. [ 1913 Webster ]

I had forgot that foul conspiracy Of the beast Caliban and his confederates. Shak. [ 1913 Webster ]

2. A concurence or general tendency, as of circumstances, to one event, as if by agreement. [ 1913 Webster ]

A conspiracy in all heavenly and earthly things. Sir P. Sidney. [ 1913 Webster ]

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. [ 1913 Webster ]

n.; pl. Piracies [ Cf. LL. piratia, Gr. &unr_;. See Pirate. ] 1. The act or crime of a pirate. [ 1913 Webster ]

2. (Common Law) Robbery on the high seas; the taking of property from others on the open sea by open violence; without lawful authority, and with intent to steal; -- a crime answering to robbery on land. [ 1913 Webster ]

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☞ By statute law several other offenses committed on the seas (as trading with known pirates, or engaging in the slave trade) have been made piracy. [ 1913 Webster ]

3. “Sometimes used, in a quasi-figurative sense, of violation of copyright; but for this, infringement is the correct and preferable term.” Abbott. [ 1913 Webster ]