Englishfor English speakers
instant
Noun
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An instant is a very short time.
She looked at me and for an instant, I thought she was her mother.
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Instant mathx/math is mathx/math that is ready, or happens, very quickly (in an instant).
I don't like instant coffee, but that's usually what I drink.
With his first book, he was an instant success.
rotation
Noun
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Rotation is the action of moving around an axis or center.
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A rotation is one full turn back to the original position.
The planet Earth completes one rotation each day.