Definition of neck frill in US English:

neck frill


  • 1A frill of material at the neck of a garment, a ruff.

  • 2Palaeontology an upward-curving bony plate extending behind the skull of many dinosaurs, chiefly ceratopsians.

  • 3Zoology the erectable folds of skin on the neck of the Australian frilled lizard, Chlamydosaurus kingii (family Agamidae), which are raised in threat displays and for thermoregulation.


Mid 19th century; earliest use found in Littell's Living Age.