What do we mean by "software reuse"? I propose this definition: Software reuse happens whenever a given piece of code is called from more than one other code-l

What do we mean by "software reuse"? I propose this definition: Software reuse happens whenever a given piece of code is called from more than one other code-location. That means whenever a function has more than one caller we have reuse. Or when a web-service request is created from more than one code-location, we have reuse. Is there an official definition for what "software reuse" means?