| Term | Definition |
| Nominating | The major function of a political party. |
| Informer Stimulator | The function of political parties to ensure interest and participation. |
| Bonding Agent | The "seal of approval" function of political parties. |
| Government | The function of political parties based on partisanship. |
| Watchdog | The function of the party "out of power." |
| Closed Primary | A direct primary in which only party members may vote. |
| Consensus | General agreement among various groups on fundamental matters. |
| Incumbent | A person seeking re-election. |
| Split Ticket | Voting for candidates of both parties for different offices in the same election. |
| Electorate | The potential voting population. |
| Lobbyist | An agent for a pressure group(interest group) whose goal is to impact public policy. |
| Ideological | A type of third party formed around a single public policy matter. |
| Single Issue | A type of third party based on a particular set of beliefs. |
| Economic Protest | A type of minor party rooted in periods of economic discontent. |
| Splinter | A type of minor party that has split away from one of the major political parties. |