Definition of "underflow" [underflow]

• A data-processing error arising when the absolute value of a computed quantity is smaller than the limits of precision of the computing device, retaining at least one significant digit. (noun)

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.

• "The Arkansas River was always the primary source of water for both the North and South Side systems, although the North Side briefly flirted with using the 'underflow' of Fountain Creek."
• "Because I know that on the surface it runs directionally, but on the underflow, doesn't it travel further south from the U.S. toward the Caribbean nation?"
• "Make no mistake of it, we are in for a turbulent ride down a waterfall, and at the bottom is death by drowning in the underflow and hydraulic suction seen only a few times throughout HisStory."