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intr.v. colÂ·ludÂ·ed, colÂ·ludÂ·ing, colÂ·ludes. To act together, often in secret, to achieve an illegal or improper purpose: The managers and the union leaders regularly colluded to rob the plantations at the expense of the workers (Daniel Wilkinson). [Latin collÅ«dere : com-, com- + lÅ«dere, to play; see leid- in Indo-European roots.]
involving collusion; fraudulently contrived by agreement: a collusive agreement to increase prices. Origin of collusive. 1665-1675. First recorded in 1665-75; collus(ion) + -ive.