Definition of crystal noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈkrɪstl//
    ; NAmE NAmE//ˈkrɪstl//
    Molecules and matter, Jewellery
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  1. 1[countable] a small piece of a substance with many even sides, that is formed naturally when the substance becomes solid ice/salt crystals See related entries: Molecules and matter
  2. 2[uncountable, countable] a clear mineral, such as quartz, used in making jewellery and decorative objects a pair of crystal earrings See related entries: Jewellery
  3. 3[uncountable] glass of very high quality a crystal chandelier/vase Every table had been set with fine china and crystal.
  4. 4[countable] (North American English) a piece of glass or plastic that covers the face of a watch see also liquid crystal display
  5. 5= meth
  6. Word Originlate Old English (denoting ice or a mineral resembling it), from Old French cristal, from Latin crystallum, from Greek krustallos ‘ice, crystal’. The chemistry sense dates from the early 17th cent.
See the Oxford Advanced American Dictionary entry: crystal