Dictionary
noun : ENVELOPE
Source:WordNet 3.1
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1. (
) a flat (usually rectangular) container for a letter, thin package, etc. ;
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2. (
) any wrapper or covering ;
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3. (
) a curve that is tangent to each of a family of curves ;
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4. (
) a natural covering (as by a fluid); "the spacecraft detected an envelope of gas around the comet" ;
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5. (
) the maximum operating capability of a system (especially an aircraft); "test pilots try to push the envelope" ;
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6. (
) the bag containing the gas in a balloon ;
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