frill frill /ˈfrɪl/

noun

1. Ornamental objects of no great value  ( falderol , folderal , frill , gimcrack , gimcrackery , nonsense , trumpery [Archaic] , falderal )
   ornamental objects of no great value
   
2. A strip of pleated material used as a decoration or a trim  ( flounce , frill , furbelow , ruffle )
   a strip of pleated material used as a decoration or a trim
   
   
3. An external body part consisting of feathers or hair about the neck of a bird or other animal  ( frill , ruff )
   an external body part consisting of feathers or hair about the neck of a bird or other animal
   
4. (paleontology) a bony plate that curves upward behind the skull of many ceratopsian dinosaurs  ( frill )
   (paleontology) a bony plate that curves upward behind the skull of many ceratopsian dinosaurs