noun: a flat (usually rectangular) container for a letter, thin package, etc.
noun: any wrapper or covering
noun: a curve that is tangent to each of a family of curves
noun: a natural covering (as by a fluid); "the spacecraft detected an envelope of gas around the comet"
noun: the maximum operating capability of a system (especially an aircraft); "test pilots try to push the envelope"
noun: the bag containing the gas in a balloon
Length: 8 letters
Scrabble value: 13
Words with Friends value: 17
Literati value: 12
TWL (USA): Found
SOWPODS (UK): Found
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