Definition of swansdown in US English:

swansdown

(also swan's down)

noun

  • 1The fine down of a swan, used for trimmings and powder puffs.

    • ‘It was a fancy version of the scarf and could be made of swansdown or fur.’
    • ‘On the chest, there is a shaped cloth panel which is decorated with swansdown, rhinestones and mirrors.’
    • ‘A very light rouleau of swansdown bordered the corsage and the fronts of the dress.’
    • ‘Everything about her shimmers and shines, all softened by beautiful white swansdown and feathers.’
  • 2A thick cotton fabric with a soft nap on one side, used especially for baby clothes.

    • ‘The weavers emigrated to the Austrian Low Countries, especially to Mouscron, where production of swansdown was allowed since 1758.’
    1. 2.1 A soft, thick fabric made from wool mixed with a little silk or cotton.

Pronunciation

swansdown

/ˈswɑnzdaʊn//ˈswänzdoun/