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Envelope
01
busta
a thin, paper cover in which we put and send a letter
Example
He wrote the address on the envelope.
Ha scritto l'indirizzo su la busta.
I need to buy some envelopes for my Christmas cards.
Devo comprare delle buste per i miei biglietti di Natale.
02
busta, involucro
any wrapper or covering
03
involucro, sacca del gas
the bag containing the gas in a balloon
04
involucro, limite operativo
the maximum operating capability of a system (especially an aircraft)
05
involucro, guaina
a natural covering (as by a fluid)
06
inviluppo, curva inviluppo
a curve that is tangent to each of a family of curves
