Definition of "two-party" []

• Supported by both sides (adjective)

WordNet. Princeton University. 2010.

• "Non-condorcet winners get elected infrequently because people vote strategically, which is why you see continued two-party dominance in Australia, land of the transferable vote."
• "I would say the rise of the two-party system in Congress is almost entirely attributable to single-member districts with first-past-the-post voting."
• "But Al, what evidence is there that the two-party structure is breaking down?"