Definition and meaning of third party: A third party is a political organization that is not affiliated with either of the two major political parties in the United States, the Democratic Party or the Republican Party. A third-party candidate is someone who is running for office outside of the two major parties. Third parties are typically more reform-minded and are often seen as a way to challenge the status quo of the two-party system. Third parties have gained more recognition in recent years, with the emergence of the People's Party, Libertarian Party, and Green Party. These parties are often formed to advocate for different ideologies and platforms than those of the major parties. They can help to fill the gaps in the political spectrum that are often overlooked by the major parties. In addition to these established third parties, there are also often independent candidates who are running outside of any party. These candidates are often motivated to run to represent the views of those who are not accurately represented by the major parties. Third parties are a key part of a healthy democracy because they give citizens more choice and offer a platform for reform. They can help to bridge the gap between the major parties and cater to the needs of minority groups. This can help to create a more diverse and open political climate.