Antonyms and Synonyms for envelope

1. envelope (n.)

a flat (usually rectangular) container for a letter, thin package, etc.

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2. envelope (n.)

any wrapper or covering

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3. envelope (n.)

the maximum operating capability of a system (especially an aircraft)

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4. envelope (n.)

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

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5. envelope (n.)

the bag containing the gas in a balloon

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6. envelope (n.)

a natural covering (as by a fluid)

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