What Does Debugger Mean?

A debugger is a software program used to test and find bugs (errors) in other programs.

Techopedia Explains Debugger

A debugger is a computer program used by programmers to test and debug a target program. Debuggers may use instruction-set simulators, rather than running a program directly on the processor to achieve a higher level of control over its execution. This allows debuggers to stop or halt the program according to specific conditions. However, use of simulators decreases execution speed.