Englishfor English speakers
open
Verb
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To move something to the side to allow entrance.
I will open the door for our guests.
—
To prepare for business.
She opened the store.
open
Adjective
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Having a hole or opening, not closed.
The door was open.
—
Available for business.
The shop is open.
sphere
Noun
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A sphere is a shape that is round in all directions, like a ball. Every point on a sphere is the same distance from the centre (a point in the middle) of the sphere.
The Earth is almost exactly a sphere.
A drop of water can be a sphere while it's falling.