envelope

名词 n. 动词 v.
中文释义
英 /ˈɛnvə(ˌ)ləʊp/|/ˈɒnvə(ˌ)ləʊp/|/ˈɒnvləʊp/|/ˈɑ̃və(ˌ)ləʊp/    美 /ˈɛnvə(ˌ)loʊp/|/ˈɑn-/

英文释义

名词 n.
  1. A paper or cardboard wrapper used to enclose small, flat items, especially letters, for mailing.
    — Now we are liberal with our innermost secrets, spraying them into the public ether with a generosity our forebears could not have imagined. Where we once sent love letters in a sealed envelope, or stuck photographs of our children in a family album, now such private material is despatched to servers and clouds operated by people we don't know and will never meet.
  2. Something that envelops; a wrapping.
  3. A bag containing the lifting gas of a balloon or airship; fabric that encloses the gas-bags of an airship.
    — They have no internal or external support structure, being simply a fabric bag (or envelope) filled with a lighter than air gas. Inside the envelope are one or more "ballonets", or smaller bags, which help maintain the envelope's shape.
  4. A mathematical curve, surface, or higher-dimensional object that is the tangent to a given family of lines, curves, surfaces, or higher-dimensional objects.
  5. A curve that bounds another curve or set of curves, as the modulation envelope of an amplitude-modulated carrier wave in electronics.
  6. The shape of a sound, which may be controlled by a synthesizer or sampler.
  7. The information used for routing a message that is transmitted with the message but not part of its contents.
  8. An enclosing structure or cover, such as a membrane; a space between two membranes
  9. The set of limitations within which a technological system can perform safely and effectively.
    — push the envelope
  10. The nebulous covering of the head or nucleus of a comet; a coma.
  11. An earthwork in the form of a single parapet or a small rampart, sometimes raised in the ditch and sometimes beyond it.
    — make a blind all along the bottom of the ditch of the Envelope
动词 v.
  1. To put (something) in an envelope. rare,transitive
    — Arthur Armytage drew the precious document from his bureau; and without trusting himself to a re-perusal, enveloped and re-enveloped—sealed and resealed it;—mounted his horse, and rode off to Greta Castle.
  2. Archaic form of envelop. alt-of,archaic
    — Again, if the plane of the impressed couple intersects the mean plane between N and C, it will envelope the cone whose focals are ON, ON′, and whose internal axis is therefore OA.

词形变化

envelopes plural envelopes present,singular,third-person enveloping participle,present enveloped participle,past enveloped past envelopes present,singular,third-person enveloping participle,present enveloped participle,past enveloped past

词汇关系

衍生词
back-of-an-envelope back-of-the-envelope banker's envelope blind envelope brown envelope journalism brown envelope syndrome bubble envelope building envelope concave envelope convex envelope Dahlke envelope envelogram envelopathy envelope detector envelope paradox envelope-stuffer envelope stuffer flight envelope floral envelope Gaza Envelope invitation envelope kinematic envelope manila envelope nuclear envelope opening of an envelope padded envelope penalty envelope push the edge of the envelope push the envelope red envelope return envelope stretch the envelope stripped-envelope supernova transenvelope viral envelope window envelope work envelope

词源

词源 1
PIE word
*h₁én
From French enveloppe. The engineering sense is derived from flight envelope. The verb is from the noun.
词源 2
See envelop.
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