A framework is an existing library or set of libraries that provides overarching application structure so that the developer can focus primarily on their application's implementation details instead. In most cases the tag for a specific framework should be used instead of this tag.
Framework
A framework is a set of code or libraries which provide functionality common to a whole class of applications. While one library will usually provide one specific piece of functionality, frameworks will offer a broader range which are all often used by one type of application. Rather than rewriting commonly used logic, a programmer can leverage a framework which provides often used functionality, limiting the time required to build an application and reducing the possibility of introducing new bugs.