DictionaryrillSmall stream
noun

rill

RIL/rɪl/

A narrow stream of flowing water.

A clear rill flows between the rocks beside the trail.

A tiny, shallow brook winds through a narrow grassy channel, with pebbles visible beneath clear water and small ripples showing its flow.
Etymology

Low German rille covered both grooves or furrows and running streams. English rill is from or related to it, sharing the sense of a small watercourse or channel.

In context

North Carolina 4-H1:43
Rainfall intensity, volume, slope, and soil type are among some of the factors that influence soil erosion and rill and gully formation.
Rill and Gully Formation

More examples

  • Melting snow feeds a rill that runs down the hillside.
  • Several rills join to form a larger stream.
  • We step across the shallow rill without getting wet.

Forms

rill · rills

Similar words

rivulet
A close alternative for a very small stream of water.
brook
A small natural stream, generally larger than a rill.
stream
A broader term that includes much larger flowing waterways.