/ Dictionary / Index D drainless: Meaning and Definition of Find definitions for: drain•less Pronunciation: (drān'lis), [key] — adj. inexhaustible. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. drainfield drainpipe Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language