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envelop verb

  /ɛnˈvɛləp/
  • (transitive) To surround or enclose.
 envelopper

envelope noun

  /-lop/ , /ˈɑn-/ , /ˈɑ̃vələʊp/ , /ˈɒnvləʊp/ , /ˈɒnvələʊp/ , /ˈɛnvələʊp/ , /ˈɛnvəˌloʊp/
  • A paper or cardboard wrapper used to enclose small, flat items, especially letters, for mailing.
  • Something that envelops; a wrapping.
  • (geometry) A mathematical curve, surface, or higher-dimensional object that is the tangent to a given family of lines, curves, surfaces, or higher-dimensional objects.
 enveloppe

enveloping

enveloppant
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