rill Meaning, Definition & Usage

  1. noun a small stream
    run; rivulet; streamlet; runnel.
  2. noun a small channel (as one formed by soil erosion)

WordNet

Rill noun
Etymology
Cf. LG. rille a small channel or brook, a furrow, a chamfer, OE. rigol a small brook, F. rigole a trench or furrow for water, W. rhill a row, rhigol a little ditch.
Definitions
  1. A very small brook; a streamlet.
  2. (Astron.) See Rille.
Rill intransitive verb
Definitions
  1. To run a small stream. R. Prior.

Webster 1913