/ Dictionary / Index U unplumbed: Meaning and Definition of Find definitions for: un•plumbed Pronunciation: (un-plumd'), [key] — adj. not plumbed; not tested or measured with a plumb line. not understood or explored in depth, as an idea, theory, feeling, or experience. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unplumbed (Thesaurus) unplug unpolished rice Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language