ENVELOPE

Stationery enclosure

• Academy Awards prop

• Award presenter's prop

• Awards show request

• Greek goddess of mail?

• It gets opened before some speeches

• It might have a window

• Letter holder

• Mail holder

• Wrapper, of sorts

• The bag containing the gas in a balloon

• A flat rectangular paper container for papers

• Any wrapper or covering

• A curve that is tangent to each of a family of curves

• A natural covering (as by a fluid)

• The maximum operating capability of a system