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Envelope

//ˈɛnvələʊp// noun, verb

Noun

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
any wrapper or covering wordnet
3
Something that envelops; a wrapping.
4
a flat (usually rectangular) container for a letter, thin package, etc. wordnet
5
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."

Show 12 more definitions

6
the bag containing the gas in a balloon wordnet
7
A mathematical curve, surface, or higher-dimensional object that is the tangent to a given family of lines, curves, surfaces, or higher-dimensional objects.
8
the maximum operating capability of a system (especially an aircraft) wordnet
9
A curve that bounds another curve or set of curves, as the modulation envelope of an amplitude-modulated carrier wave in electronics.
10
a natural covering (as by a fluid) wordnet
11
The shape of a sound, which may be controlled by a synthesizer or sampler.
12
a curve that is tangent to each of a family of curves wordnet
13
The information used for routing a message that is transmitted with the message but not part of its contents.
14
An enclosing structure or cover, such as a membrane; a space between two membranes
15
The set of limitations within which a technological system can perform safely and effectively.
"push the envelope"
16
The nebulous covering of the head or nucleus of a comet; a coma.
17
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"

Verb

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."

Etymology 1

PIE word *h₁én From French enveloppe. The engineering sense is derived from flight envelope. The verb is from the noun.

Etymology 2

PIE word *h₁én From French enveloppe. The engineering sense is derived from flight envelope. The verb is from the noun.

Etymology 3

See envelop.

Unscramble this word: envelope