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Envelope
01
koperta, otoczka
a thin, paper cover in which we put and send a letter
Example
He wrote the address on the envelope.
Napisał adres na kopercie.
I need to buy some envelopes for my Christmas cards.
Muszę kupić kilka kopert na moje kartki świąteczne.
02
koperta, opakowanie
any wrapper or covering
03
koperta, worek gazowy
the bag containing the gas in a balloon
04
koperta, sufit operacyjny
the maximum operating capability of a system (especially an aircraft)
05
osłonka, pokrycie
a natural covering (as by a fluid)
06
obwiednia, koperta
a curve that is tangent to each of a family of curves
