Meaning of the word envelopes in English

What does envelopes mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

envelopes

a flat paper container with a sealable flap, used to enclose a letter or document.

Synonym:

wrapper wrapping wrap sleeve cover covering casing case

a covering or containing structure or layer.

Example:

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the external envelope of the swimming pool

Related Word:

envelope push the envelope