A ruffled, gathered, or pleated border or projection, such as a fabric edge used to trim clothing or a curled paper strip for decorating the end of the bone of a piece of meat. A ruff of hair or feathers about the neck of an animal or a bird. A wrinkling of the edge of a photographic film. Informal Something that is desirable but not a necessity; a luxury. See Synonyms at luxury. To make into a ruffle or frill. To add a ruffle or frill to. To become wrinkled along the edge.