Agreed. I interviewed a few QA candidates at a previous company that used a term completely differently than we did. When I rephrased the question from defining the term to "what kind of test would you run in this situation" I got the kind of answers I would expect. It's far more important that a candidate understands the concepts needed to solve a problem, than that they have memorized a term.

Hell, someone could be able to define MVC and explain how you would use it, but have no idea how to actually implement something using it for a given programming language.

Knowing proper terminology is necessary in order to stay up to date with developments in your professional subject area. If concept X is an established concept in your professional area of expertise, and you don't even know that its name is concept X, then you likely have not read much about concept X, and consequently, are likely not up to date with current developments related to concept X. This isn't just semantics, it's about professional literacy.