Dictionary Check: envelope
"envelope" is a valid word!
Scrabble
13
points
Words with Friends
17
points
Definition
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)
Example:
"the spacecraft detected an envelope of gas around the comet"
noun
the maximum operating capability of a system (especially an aircraft)
Example:
"test pilots try to push the envelope"
noun
the bag containing the gas in a balloon
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