Okay kiddo, so a backless dress is a dress that doesn't have any fabric covering the back part of your body. This means that your back will be exposed and people will be able to see it! It's kind of like wearing a shirt that is missing the back part.
Backless dresses can be pretty and fancy, and they are often worn to fancy events like parties or weddings. But they might not be the best option for cold weather, since your back might get chilly!
One thing to keep in mind is that backless dresses can sometimes be a little tricky to wear. You might need to find a special bra that won't show in the back, or you might need to use some tape to make sure your dress stays in place.
Overall, backless dresses are a fun and stylish option for when you want to show off a little bit of skin and feel fancy!