Most consider a walk-on anything that doesn't involve spoken dialogue, especially if it's a solo entry- you go onstage, do something that lets the audience get a good look at your costume and walk off. My own entry is a walk-on, since I'll be walking onstage, striking cool poses to music and walking off. So, yes, walk-ons are widely accepted. You can make a fantastic entry without having to say a word or be a great actor.
Originally Posted by Moofingham
There is a vibe here that says "We're in this together! Through thick and thin fabric! Through cold water washes and burning hot irons! Though we might super glue ourselves to our projects, cut holes/gashes/oh-god-mom's-gonna-kill-me into the dining room table, we will stand strong together. Unless there is a 75% off sale at the Fabric store. Then you're on your own. And get the hell out of my way." <3