from The American Heritage® Dictionary of the English Language, 4th Edition
- n. 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A condition in which the value of a computed quantity is smaller than the smallest non-zero value that can be physically stored; usually treated as an error condition
- n. The error condition that results from an attempt to retrieve an item from an empty stack
from The Century Dictionary and Cyclopedia
- n. The water which is now known to be often in transit beneath the apparently dry gravels of rivers in arid districts, such as the southwestern United States.
- n. A current flowing beneath the surface, or not in the same direction with the surface-current, over a certain region; an undercurrent: the opposite of surface-flow or surface-current.
under- + flow, modelled on overflow. (Wiktionary)