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Consult Chambers 21st Century Dictionary, The Chambers Thesaurus (1996) or Chambers Biographical Dictionary (1997 edition with amendments). Enter your search and choose your title from the drop-down menu.

Search results for 'envelope':

envelope noun 1 a thin flat sealable paper packet or cover, especially for a letter. 2 a cover or wrapper of any kind. 3 biol a plant or animal structure that contains or encloses something, eg the nuclear envelope, consisting of a double membrane that surrounds the nucleus of a cell. 4 technical the glass casing that surrounds an incandescent lamp.
ETYMOLOGY: 18c: from French enveloppe; related to envelop.