Definition of ENVELOPE

noun : ENVELOPE

Source: WordNet 3.1

  • 1. (

    ) a flat (usually rectangular) container for a letter, thin package, etc. ;

  • 3. (

    ) a curve that is tangent to each of a family of curves ;

  • 4. (

    ) a natural covering (as by a fluid); "the spacecraft detected an envelope of gas around the comet" ;

  • 5. (

    ) the maximum operating capability of a system (especially an aircraft); "test pilots try to push the envelope" ;


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