01 n. An incomplete or partial shadow.
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1.
An incomplete or partial shadow.
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2.
The shadow cast, in an eclipse, where the light is partly, but not wholly, cut off by the intervening body; the space of partial illumination between the umbra, or perfect shadow, on all sides, and the full light.(Astron.)
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3.
The part of a picture where the shade imperceptibly blends with the light.(Paint.)