Background for envelope

envelope

/ˈɒn.və.ləʊp/ /ˈɑn.vəˌloʊp/ /ɛnˈvɛləp/

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noun

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

Examples :

"My sister put the letter in an envelope and took it to the mailbox. "

stationery communication

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noun

Something that envelops; a wrapping.

Examples :

"The letter was carefully placed inside the envelope. "

stationery material

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noun

A bag containing the lifting gas of a balloon or airship; fabric that encloses the gas-bags of an airship.

Examples :

"The hot air balloonist carefully inspected the envelope for any tears before filling it with hot air. "

vehicle part technology nautical

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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.

Examples :

"The engineer used the envelope of possible flight paths to determine the safest trajectory for the rocket. "

math science technical

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noun

A curve that bounds another curve or set of curves, as the modulation envelope of an amplitude-modulated carrier wave in electronics.

Examples :

"The technician carefully measured the envelope of the radio signal to ensure proper transmission. "

electronics technology signal physics math

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noun

The shape of a sound, which may be controlled by a synthesizer or sampler.

Examples :

"The musician carefully shaped the sound of the trumpet using a synthesizer to create a specific envelope. "

music sound technology electronics signal

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noun

The information used for routing a message that is transmitted with the message but not part of its contents.

Examples :

"The envelope on the letter contained the address, but not the actual letter itself. "

technology computing communication internet technical

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noun

An enclosing structure or cover, such as a membrane; a space between two membranes

Examples :

"The onion's outer layer is a tough envelope protecting the delicate inner parts. "

material structure stationery writing

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noun

The set of limitations within which a technological system can perform safely and effectively.

Examples :

"The new software program has a narrow envelope of acceptable temperatures for optimal performance. "

technology technical system range

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noun

The nebulous covering of the head or nucleus of a comet; a coma.

Examples :

"The comet's envelope was a bright, fuzzy cloud of gas and dust. "

astronomy space

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noun

An earthwork in the form of a single parapet or a small rampart, sometimes raised in the ditch and sometimes beyond it.

Examples :

"The soldiers built an envelope around the village to protect it from enemy attack. "

military architecture

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verb

To surround or enclose.

Examples :

"The thick cardboard box enveloped the fragile glassware, protecting it from damage during shipping. "

area environment