ˈenvələʊp
ˈenvəloʊp
1 a flat paper container used for sending letters inwriting paper and envelopesan airmail/padded/prepaid envelope see also pay envelope, sae, SASE2 a flat container made of plastic for keeping papers in Idioms
see push the envelope at push verb
Definition of envelope noun from the Oxford Advanced Learner's Dictionary
1 a flat paper container used for sending letters inwriting paper and envelopesan airmail/padded/prepaid envelope see also pay envelope, sae, SASE2 a flat container made of plastic for keeping papers in 