Underflow

Definitions

1. A current flowing below the surface.
   countable, uncountable
2. 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.
   countable, uncountable
3. The error condition that results from an attempt to retrieve an item from an empty stack.
   countable, uncountable

Equivalents

CEFR level