Oh yes, the so-called "digital zoom".

In my mind, it does not matter how you made that picture. Move your camera close to the subject, take the photo through a microscope, crop, beg, borrow or steal... the only thing that matters and defines it as macro is that the resulting picture shows larger than the real life subject on the display medium.

By that definition a billboard of a car can be a macro if that billboard is large enough so I agree that the definition is a bit fuzzy.