envelope[än′və lōp′, en′-]
- The definition of an envelope is a container made of folded paper or cardboard.
An example of an envelope is what you would seal a letter in before mailing it to someone.
Bright colored envelopes.
- a thing that envelops; wrapper; covering
- a folded paper container as for a letter, usually with a gummed flap for sealing
- the outer covering of a rigid airship
- the bag that contains the gas in a balloon or nonrigid airship
- the set of limitations, as for a particular aircraft, system, etc., within the boundaries of which it can operate safely and efficiently
- a set of limits or boundaries: usually in the informal phrase , to go beyond or attempt to go beyond established rules, limits, expectations, etc.
- Astron. a cloudy mass surrounding the nucleus of a comet; coma
- Biol. any enclosing membrane, skin, shell, etc.
- Math. a curve that is tangent to every one of a family of curves, or a surface that is tangent to every one of a family of surfaces
Origin of envelopeFrench and amp; Old French enveloppe ; from Old French envoluper: see envelop
- A flat paper container, especially for a letter, usually having a gummed flap.
- Something that envelops; a wrapping.
- Biology An enclosing structure or cover, such as a membrane or the outer coat of a virus.
- The bag containing the gas in a balloon or airship.
- The set of limitations within which a technological system, especially an aircraft, can perform safely and effectively.
- Astronomy a. A usually spherical region of interstellar matter surrounding a forming star and interacting with the star's gravitational and radiation fields.b. The coma of a comet.
- Mathematics A curve or surface that is tangent to every one of a family of curves or surfaces.
Origin of envelopeFrench enveloppe, from envelopper, to envelop, from Old French envoloper; see envelop. Usage Note: Some people dislike the pronunciation (ŏn′v&schwa;-lōp′), arguing that it is pretentious for being pseudo-French and that it is unnecessary, since there exists a perfectly acceptable Anglicized pronunciation, (ĕn′v&schwa;-lōp′). In our 1992 survey, however, the (ŏn′-) pronunciation was used exclusively by 30 percent of the Usage Panel; 61 percent used only (ĕn′-). Another 9 percent said they used both pronunciations, putting the (ŏn′-) pronunciation in active use by some 40 percent of the Panel. Still others claimed not to use this pronunciation but to find it unobjectionable. It must be considered standard.
- 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 an email that is transmitted with the email but not part of its contents.
- (biology) An enclosing structure or cover, such as a membrane.
- (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.
From the French enveloppe, from envelopper.
(third-person singular simple present envelopes, present participle enveloping, simple past and past participle enveloped)
- (nonstandard) Alternative spelling of envelop.