1. A strip of pleated material used as a decoration or a trim
   "The dress was adorned with delicate frills along the hem";
   - flounce, ruffle, furbelow
    
2. (palaeontology) a bony plate that curves upward behind the skull of many ceratopsian dinosaurs
   "The Triceratops had a distinctive frill protecting its neck"
    
3. An external body part consisting of feathers or hair about the neck of a bird or other animal
   "The lizard extended its frill when threatened";
   - ruff
    
4. Ornamental objects of no great value
   "The shelf was cluttered with frills and falderals";
   - falderol [rare], gimcrackery, nonsense, trumpery [archaic], folderol [archaic], falderal [archaic]

Derived forms: frills

Type of: adornment, decoration, external body part, ornament, ornamentation, plate

Encyclopedia: Frill, John