envelope
Pronunciation: [ˈɛnvəloʊp]
Word
Context: "mail"
(noun) a flat, usually rectangular paper container used to hold letters or documents. When you write a letter and put it inside, you use an envelope to keep it safe and make it look nice.
Example
I put the birthday card in a colorful envelope.
Example
She forgot to bring an envelope for her important documents.
Example
Do you have an envelope to send this letter?
Context: "geometry"
(noun) a shape that surrounds or contains other shapes, often used in math and science. Imagine a balloon that surrounds a smaller balloon; that outer layer is like an envelope.
Example
The envelope of the balloon keeps the air inside.
Example
The shape doesn't form a proper envelope if it has holes in it.
Example
What do you think makes a perfect envelope shape in this experiment?
Context: "containment"
(verb) to surround or protect something. When you wrap something all around it, like a blanket around a toy, you're enveloping it.
Example
The fog enveloped the whole town in a lovely mist.
Example
The sunlight did not envelop the room because the curtains were drawn tight.
Example
Can you envelop your teddy bear with my big jacket?
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