envelope

[ en-vuh-lohp, ahn- ]
/ ˈɛn vəˌloʊp, ˈɑn- /

noun

Idioms

    push the envelope, to stretch established limits, as in technological advance or social innovation.
Also envelop.

Origin of envelope

1700–10; < French enveloppe, derivative of envelopper to envelop

Can be confused

envelop envelope
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for envelope

British Dictionary definitions for envelope

envelope

/ (ˈɛnvəˌləʊp, ˈɒn-) /

noun

Word Origin for envelope

C18: from French enveloppe, from envelopper to wrap around; see envelop; sense 8 from aeronautics jargon, referring to graphs of aircraft performance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for envelope

envelope

[ ĕnvə-lōp′, ŏn- ]

n.

An enclosing structure or cover, such as a membrane or the outer coat of a virus.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.