envelope
definition: any wrapper or covering
example:
speech part: noun
synonyms:
definition: a flat (usually rectangular) container for a letter, thin package, etc.
example:
speech part: noun
synonyms:
definition: the bag containing the gas in a balloon
example:
speech part: noun
synonyms:
gasbag
definition: the maximum operating capability of a system (especially an aircraft)
example: test pilots try to push the envelope
speech part: noun
synonyms:
definition: a natural covering made out of liquid or gas
example: The spacecraft detected an envelope of gas around the comet.
speech part: noun
synonyms:
definition: a curve that is tangent to each of a family of curves
example:
speech part: noun
synonyms: