Dictionary

envelope

Pronunciation

Noun

envelope (plural envelopes)

A paper or cardboard wrapper used to enclose small, flat items, especially letters, for mailing.
Something that envelops; a wrapping.
A bag containing the lifting gas of a balloon or airship; fabric that encloses the gas-bags of an airship.
(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.
(electronics) A curve that bounds another curve or set of curves, as the modulation envelope of an amplitude-modulated carrier wave in electronics.
(music) The shape of a sound, which may be controlled by a synthesizer or sampler.
(computing) The information used for routing a message that is transmitted with the message but not part of its contents.
(biology) An enclosing structure or cover, such as a membrane; a space between two membranes
(engineering) The set of limitations within which a technological system can perform safely and effectively.
(astronomy) The nebulous covering of the head or nucleus of a comet; a coma.
An earthwork in the form of a single parapet or a small rampart, sometimes raised in the ditch and sometimes beyond it.

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Pronunciation

Verb

envelope (envelopes, present participle enveloping; past and past participle enveloped)

Archaic form of envelop#English|envelop.
- 1877, James Booth, A Treatise on Some New Geometrical Methods (page 209)
  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.

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