Brand New – item must be in original packaging and/or have the tags still on it and have no signs of ANY use.
Barely Used – item must show no signs of use but may not have the original packaging or tags
Open Box -- box has been opened, but the item has never been used. There should be no flaws, no signs of use, and in brand new condition as if you purchased it from the store.
Gently Used – item may show some signs of use, like minor scratches or stains, but still includes all pieces and is in perfect working order (e.g. battery operated functions all work properly), unless otherwise noted in the comments.
Loved – item shows signs of wear in the form of tears, fabric stains or fading, and may be missing pieces. Some features or functions may not be working properly, but if the item is not working properly it will be noted.