Englishfor English speakers
propagation
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noun
the spreading of something (a belief or practice) into new regions
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noun
(= generation)
the act of producing offspring or multiplying by such production
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noun
the movement of a wave through a medium
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.