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Translate envelope into Spanish
1A flat paper container with a sealable flap, used to enclose a letter or document.
2A covering or containing structure or layer.
Approach or extend the limits of what is possible.
Used in reference to calculations or plans of the most sketchy kind.
Mid 16th century (in the sense ‘wrapper, enveloping layer’; originally as envelope): from French enveloppe, from envelopper ‘envelop’. The sense ‘covering of a letter’ dates from the early 18th century.