gray bird, In the technical sense, yes, anytime you run the case into a “ full-length” resizing or “neck-sizing” die....you are resizing the case. Though, I think as a general statement, the term re-sizing is thought of as “full-length” resizing. As probably most are aware, “full-length” resizing, sets the shoulder back, as well as reducing the overall case outside dimensions....bringing it back to or nearly to, new/unfired case dimensions!
For our (wife and myself) hunting rifles, I use a “full-length” resizing die, but “only” do a partial resize. I run the case into the die only far enough to “kiss” the case shoulder.....doing minimal shoulder setback. In my scenario, I’m between, “neck-sizing” only and “full-length” resizing! While chambering the round does require more effort than a case brought back to factory case dimensions, the minimal resizing extends the expected brass life. Essentially, only uniforming and reducing the neck OD for proper neck tension and minimally setting the shoulder back, for ease of chambering. In that I am loading to maximum (maybe a bit beyond) SAAMI specifications, I can get 10+ firings before discarding the case.
I realize that you and many others likely know and understand all of that “gibberish”, but perhaps I was able to “further confuse” some that do not hand-load! ! memtb