Envelope — synonyms, definition

1. envelope (Noun)

casing container cover gasbag pocket sheath wrapper

envelope (Noun) — A flat (usually rectangular) container for a letter, thin package, etc..

envelope (Noun) — Any wrapper or covering.

envelope (Noun) — A curve that is tangent to each of a family of curves.

envelope (Noun) — A natural covering (as by a fluid). ex. "the spacecraft detected an envelope of gas around the comet"

envelope (Noun) — The maximum operating capability of a system (especially an aircraft). ex. "test pilots try to push the envelope"

envelope (Noun) — The bag containing the gas in a balloon.

bag container cover covering curve curved shape natural covering operating capability performance capability wrap wrapper wrapping window envelope balloon