Hmm, that’s given me pause, to reconsider.

I consider an “argument” when voices get raised and people get heated. Big or small is difference of how long people are upset and how loud participants get. I will concede I was unwittingly applying a definition other people may not share.

Note: it it gets physical, that escalates from “argument” to “fight”.

Edit: to address your comment more directly. No, if people are being civil and tones are reasonable, a disagreement doesn’t have to be an argument. It’s just another discussion. Perhaps a debate. But an “argument” in my mind is oppositional.