What I'm saying is that if someone asked you what a wrap is, you could start by telling them that it's a kind of sandwich, which orients them to the general nature of said foodstuff, after which you can then interrupt their musings with more detail which will supply them with a more sophisticated understanding of what a wrap is, and both its similarity to and distinction from a sandwich 'proper'.
Much as if you asked me what a samosa is, I could initially reduce your ignorance by informing you that it is a kind of pie, although it does not belong to the strictly-defined class of pies as meat or fruit contained in pastry.