| Definitions of 'envelope' |
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1. (noun)
envelope
a flat (usually rectangular) container for a letter, thin package, etc.
2. (noun)
envelope
any wrapper or covering
3. (noun)
envelope
a curve that is tangent to each of a family of curves
4. (noun)
envelope
a natural covering (as by a fluid)
"the spacecraft detected an envelope of gas around the comet"
5. (noun)
envelope
the maximum operating capability of a system (especially an aircraft)
"test pilots try to push the envelope"
6. (noun)
envelope, gasbag
the bag containing the gas in a balloon
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Definition of 'envelope'
