In computer science, a memory leak is a particular type of unintentional memory consumption by a computer program where the program fails to release memory when no longer needed. This condition is normally the result of a bug in a program that prevents it from freeing up memory that it no longer needs.
This term has the potential to be confusing, since memory is not physically lost from the computer. Rather, memory is allocated to a program, and that program subsequently loses the ability to access it due to program logic flaws.
As is noted below, a memory leak has similar symptoms to a number of other problems, and generally can only be diagnosed by a programmer with access to the program source code; however many people are quick to describe any unwanted increase in memory usage as a memory leak, even if this is not strictly accurate.
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