envelope

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. a flat (usually rectangular) container for a letter, thin package, etc. (Freq. 9)
• Hypernyms:
container
• Hyponyms:
window envelope
2. any wrapper or covering (Freq. 2)
• Hypernyms:
wrapping, wrap, wrapper
3. a curve that is tangent to each of a family of curves
• Hypernyms:
curve, curved shape
4. a natural covering (as by a fluid)
- the spacecraft detected an envelope of gas around the comet
• Hypernyms:
covering, natural covering, cover
5. the maximum operating capability of a system (especially an aircraft)
- test pilots try to push the envelope
• Hypernyms:
operating capability, performance capability
6. the bag containing the gas in a balloon
• Syn:
gasbag
• Hypernyms:
bag
• Part Holonyms:
balloon