/ Dictionary / Index R runnel: Meaning and Definition of Find definitions for: run•nel Pronunciation: (run'l), [key] — n. a small stream; brook; rivulet. a small channel, as for water. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: runnel (Thesaurus) runless runner Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language