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|Look up envelope in Wiktionary, the free dictionary.|
An envelope is the paper container used to hold a letter being sent by post.
Envelope may also refer to:
- Envelope (mathematics), a curve, surface, or higher-dimensional object defined as being tangent to a given family of lines or curves (or surfaces, or higher-dimensional objects, respectively)
- Envelope (category theory)
- Viral envelope, the membranal covering surrounding the capsid of a virus
- Cell envelope of a bacterium, consisting of the cell membrane, cell wall and outer membrane
In applied science:
- Envelope (waves), a curve joining the peaks of an oscillating waveform or signal
- Envelope detector, an electronic circuit used to measure the envelope of a waveform
- ADSR envelope, the variation of a sound over time, as is used in sound synthesis
- Envelope (motion), a solid representing all positions that an object may occupy during its normal range of motion
- Flight envelope, the limits within which an aircraft can operate
- Building envelope, the exterior layer of a building that protects it from the elements
- Envelope (airships), the fabric skin covering the airship
- Envelopes (band), an indie/pop band from Sweden and France, based in the UK
- Envelope (film), a 2012 film
- "Envelopes", a song by Frank Zappa from his 1982 album Ship Arriving Too Late to Save a Drowning Witch.
- Envelope (poetry), a poetic device in which a line or a stanza is repeated to enclose a section of verse
- Envelope (military) (also envelop) attacking one or both of the enemy's flanks to encircle the enemy
- The envelope of an Internet Email is its SMTP routing information. The addresses in the envelope are often present in the header portion of the contents, but not for, e.g., Blind carbon copy.
- Two envelopes problem, a paradox
- Common envelope event, a short-lived phase in the evolution of a binary star in which the larger of the two stars has initiated unstable mass transfer to its companion star
disambiguation page lists articles associated with the title Envelope.
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