Definition of cullet in English:

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Pronunciation: /ˈkʌlɪt/


[mass noun]
Recycled broken or waste glass used in glass-making.
Example sentences
  • It goes without saying that the broken glass or cullet used had to be of the required colour or clear, so that no expensive new minerals were added to colour it.
  • One of our earliest industrial containers, glass is made by melting sand, soda ash, limestone, and cullet (recycled crushed glass) in furnaces heated to 2,700 degrees Fahrenheit.
  • Approximately 80 per cent of the glass now being made in Irish Glass is from cullet or recycled glass.


Early 19th century: variant of collet, in the obsolete sense 'glass left on the blowing-iron when the finished article is removed'.

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