Englishfor English speakers
variation
Noun
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A variation of something is the same thing, but changed a little bit.
The music is a variation of a Japanese song from the 1950s.
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Variation is the difference in amount, colour, size, etc. among many things.
There was a lot of variation in price among the stores.
in
Preposition
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Used to show that something is inside something else.
The cat is in the box.
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Used to show that someone is at home, or is available.
Is John in?
The Doctor is now in.
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Used to show movement towards the inside.
The rain came in through the window.
plane
Noun
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A plane is a surface that goes out in all directions indefinitely.
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A plane is a level of existence.
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A plane is a tool for smoothing wood.
plane
Verb
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If you plane, you glide or soar.
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If you plane a piece of wood, you smooth it with a plane.