When an ellipsis replaces words at the end of a sentence, your options are: I have left out some words at the end, and this is the new end of the sentence... . (dot-dot-dot-space-dot)
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.]
While you may be able to vaguely understand the term based upon the example above, let's further define collusion so that you have a better grip on what it means. Collusion is an agreement between firms that usually compete against each other in efforts to set the prices for their goods in order to gain an advantage.