Definition of envelopes Envelopes

/ɛˈnvʌlowˌps/ - [envulowps] -

We found 3 definitions of envelopes from 2 different sources.

What does envelopes mean?

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Noun Plural: envelopes
envelope - a flat (usually rectangular) container for a letter, thin package, etc.
		container any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another)
envelope - the bag containing the gas in a balloon
		gasbag
		bag a flexible container with a single opening; "he stuffed his laundry into a large bag"
envelope - any wrapper or covering
envelope - the maximum operating capability of a system (especially an aircraft); "test pilots try to push the envelope"
envelope - a natural covering (as by a fluid); "the spacecraft detected an envelope of gas around the comet"
envelope - a curve that is tangent to each of a family of curves

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

envelope
A paper or cardboard wrapper used to enclose small, flat items, especially letters, for mailing.

envelope
In astronomy, a band of light encircling the head of a comet on the side near the sun, and passing round it, so as to form the commencement of the tail.--In fortification, a work of single lines thrown up to inclose a weak ground; usually a mere earth-work.

envelope
In fortification, a work of earth, sometimes in the form of a single parapet, and at others like a small rampart; it is raised sometimes in the ditch, and sometimes beyond it. Envelopes are occasionally en zigzag, to inclose a weak ground, where that is practicable, with single lines. Envelopes, in a ditch, are sometimes called sillons, contregardes, conserves, lunettes, etc.

An envelope is a form of packing. Envelopes are used for sending letters or documents using regular postal mail. Envelopes are usually made of paper or hardened paper.

An envelope may be small enough to make you need to fold the paper going into it, or it can be as large as the paper so that you do not need to fold it. A large envelope is called a "manila envelope", usually colored a color in between yellow and orange, and is used to send several pages of papers when a regular envelope would be too small. Another reason a manila envelope would be used would be to send important papers (e.g. birth certificates) that are better left unfolded.

To pay to send the mail, a stamp is usually attached to the envelope.