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The Collaborative International Dictionary of English v.0.48 (gcide)

Gradation \Gra*da"tion\, n., [L. gradatio: cf. F. gradation. See
{Grade}.]
1. The act of progressing by regular steps or orderly
arrangement; the state of being graded or arranged in
ranks; as, the gradation of castes.
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2. The act or process of bringing to a certain grade.
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3. Any degree or relative position in an order or series.
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The several gradations of the intelligent universe.
--I. Taylor.
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4. (Fine Arts) A gradual passing from one tint to another or
from a darker to a lighter shade, as in painting or
drawing.
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6. (Mus.) A diatonic ascending or descending succession of
chords.
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Gradation \Gra*da"tion\, v. t.
To form with gradations. [R.]
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