r-doh, sou-er-]
| 1. | leaven, esp. fermented dough retained from one baking and used, rather than fresh yeast, to start the next. |
| 2. | a prospector or pioneer, esp. in Alaska or Canada. |
| 3. | any longtime resident, esp. in Alaska or Canada. |
| 4. | leavened with sourdough: sourdough bread. |