Nancy Pelosi defines it as "one-party control":
"Elect us, hold us accountable, and make a judgment and then go from there. But I do tell you that if the Democrats win and have substantial majorities, Congress of the United States will be more bipartisan,” said Pelosi."
I'm amazed she has time for making these definitions, she's so busy "trying to save the planet."
She doesn't seem too bright, does she? But all most members of the news media can do is attack Sarah Palin.