WordWeb Online

1. Engage in plotting or enter into a conspiracy, swear together
   "They conspired to overthrow the government"
   - cabal, complot, conjure, machinate
    
2. Act in unison or agreement and in secret towards a deceitful or illegal purpose
   "The two companies conspired to cause the value of the stock to fall"
   - collude

Derived forms: conspiring, conspires, conspired

See also: conspiracy, conspirative, conspirator

Type of: interact, plot

Encyclopedia: Conspire