Definition of "underflow"

underflow

noun
plural underflows
1. A current flowing below the surface.
2. (computing) 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
3. (computing) The error condition that results from an attempt to retrieve an item from an empty stack
verb
third-person singular simple present underflows, present participle underflowing, simple past and past participle underflowed
1. (computing) To trigger the condition in which the value of a computed quantity is smaller than the smallest non-zero value that can be physically stored.