envelope noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced American Dictionary at OxfordLearnersDictionaries.com

Definition of envelope noun from the Oxford Advanced American Dictionary

envelope

noun

NAmE//ˈɛnvəˌloʊp//

, NAmE//ˈɑnvəˌloʊp//

a flat paper container used for sending letters in an airmail/padded/prepaid envelope see pay envelope, SASE

Idioms

push the envelope (informal)

to go beyond the limits of what is allowed or thought to be possible He is a performer who consistently pushes the envelope of TV comedy.

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