Envelope (disambiguation)
- Building envelope
- Cell envelope
- Envelope (category theory)
- Envelope (film)
- Envelope (mathematics)
- Envelope (military)
- Envelope (motion)
- Envelope (music)
- Envelope (radar)
- Envelope (waves)
- Envelope detector
- Envelope system
- Envelopes (band)
- Flight envelope
- Gaza envelope
- Ship Arriving Too Late to Save a Drowning Witch
- Simple Mail Transfer Protocol
- Stellar envelope (disambiguation)
- Two envelopes problem
- Viral envelope