Meaning ofenvelopein English

Noun

1. a wrapper for mailing small items
2. a covering or surrounding layer; wrapper
3. a sound's shape or contour (in music)
   The audio engineer adjusted the envelope of the sound wave.
4. a curve bounding another in electronics
   In electronics, the envelope is a curve that bounds another curve.
5. message routing information
   The email server uses an envelope to route messages to the correct recipient.
6. a biological covering structure (membrane etc.)
   The cell membrane acts as an envelope that surrounds and protects the cell.
7. operational limits for a system
   The new policy defines the envelope for the company's budget allocations.