Definition of "unplumbed" []

• Not measured or sounded with a plumb: unplumbed ocean depths. (adjective)
• Not fully examined or explored: unplumbed ideas. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Joyce intended something "unplumbed," as was much of the undulating Sunda (no "m") in 1904, during which Ulysses takes place, two years before soundings by the German vessel Planet."
• "Ranged side by side with the bold, defiant eyes of the girl before him, he saw Ruth's clear, luminous eyes, like a saint's, gazing at him out of unplumbed depths of purity."
• "By suggesting unplumbed depths while Willy is still navigating the shallows of careerism, Mr. Gosling sets up his character for a heroism that's fueled in equal measure by shrewd thinking and clear feeling."