Wiktionary
n. (context computing English) Any of several faults in a personal computer's memory allocation logic whereby parts of memory become unusable or hidden.
Wikipedia
In computer science, a memory leak is a type of resource leak that occurs when a computer program incorrectly manages memory allocations in such a way that memory which is no longer needed is not released. In object-oriented programming, a memory leak may happen when an object is stored in memory but cannot be accessed by the running code. A memory leak has symptoms similar to a number of other problems and generally can only be diagnosed by a programmer with access to the program's source code.
Because they can exhaust available system memory as an application runs, memory leaks are often the cause of or a contributing factor to software aging.
Usage examples of "memory leak".
Destroying the bugs had been easy, once shed plugged the small memory leak, as easy as tripping up the meat-minds by noticing how clumsy they looked, but Hell hadnt given either the bug or the meat-minds substance.