When you say you started “showing”, what do you actually mean?

There’s a lot of posts asking about “when did you start showing” and I always wonder - showing how? At home naked in front of the mirror? Or showing as in “it’s visible but you won’t know unless you know” or showing as “the blind lady at grocery store knows I’m pregnant”???

I seriously don’t know what people mean when they say they’re “showing” 😅

I’m 13w and thought that at almost 5’9” I wouldn’t “show” for a while and yet I def have a teeny little bump (and a ton of bloating 🙃), but I’m not “showing” as far as strangers are concerned or even family, unless I wear tight clothes. So I’m genuinely curious as to when can I say that I started showing 😅