Meaning ofenvelopesin English

Noun

1. a container for small flat things
2. something that completely surrounds; a cover
3. paper wrappers for mailing items; letters
4. a covering structure; membrane or space between membranes
5. a gas bag for airships; lifting enclosure
6. a curve bounding another curve; in electronics
7. a sound's shape; controlled by synthesizers
8. information for routing messages; not part of contents
9. the limits of safe and effective system operation