From Longman Dictionary of Contemporary Englishpush the envelopepush the envelopeespecially American English to try to go beyond the normal limits of something a musician who pushes the envelope of improvisation → envelope
Examples from the Corpus
push the envelope• Each time Walters asked his employees to push the envelope, he said, "If you can dream it, you can do it."• It needs some one who understands its basic talent, some one who will help it to push the envelope of its artificial intelligence.• Both were known to push the envelope of life.push the envelopepush the envelope American English to do something that is new and that goes beyond the limits of what has already been done in a particular area of activitypush the envelope of/on ideas that push the envelope of design and construction → pushExamples from the Corpus
push the envelope• It needs some one who understands its basic talent, some one who will help it to push the envelope of its artificial intelligence.• Both were known to push the envelope of life. 