| Term | Definition |
| abolitionist | somebody who helped blacks escape to the north to be free and someone who is against slavery |
| sectionalism | loyalty to a state or section, rather than a country as a whole. This leads to a Civil War! |
| secede | to withdraw from a membership from a group |
| underground railroad | network of abolitionists who helped runaway slaves reach freedom in the North or Canada |
| fugitive | a runaway slave |
| lawsuit | legal case brought by one person or group against another to settle a dispute |
| civil war | war between people of the same country |
| popular sovereignty | idea that the people hold the authority in government, allowing each territory to decide whether or not they want slavery. |
| repeal | to cancel or undo |