Rill (?), n. [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. &root;11.]
1.
A very small brook; a streamlet.
2. Astron.
See Rille.
© Webster 1913.
Rill, v. i.
To run a small stream.
[R.]
Prior.
© Webster 1913.