| 1. | to make unclean, dirty, or filthy, esp. on the surface: to soil one's clothes. |
| 2. | to smirch, smudge, or stain: The ink soiled his hands. |
| 3. | to sully or tarnish, as with disgrace; defile morally: to soil one's good name. |
| 4. | to become soiled: White soils easily. |
| 5. | the act or fact of soiling. |
| 6. | the state of being soiled. |
| 7. | a spot, mark, or stain. |
| 8. | dirty or foul matter; filth; sewage. |
| 9. | ordure; manure. |

Material on the surface of the Earth on which plants can grow. (See topsoil.)
Note: Soil is produced by the weathering of rocks.