A bipartisan bill is a piece of legislation that has been sponsored and supported by members of both political parties. The term "bipartisan" refers to cooperation between Democrats and Republicans, who typically have different ideologies and policy positions. When they come together to support a particular bill, it indicates a level of compromise and agreement on the issue at hand. Bipartisan bills are often seen as more likely to be enacted into law because they have broad support from both sides of the political spectrum.