a small stream
a small channel (as one formed by soil erosion)
- The water in this rill is very clean.
- From west to east streams down the tumbling rill.
At these words rills of tears and blood ran..back into my nose and mouth.出自： transf.
In the wet season..the slope may be under the influence of concentrated rill action.出自： attrib.
Fast though he baled, the water rilled in faster.出自： W. de la Mare